P1573
PCM/EBTCM Serial Data Circuit
Causes
- Open, short or high resistance in the serial data wiring between PCM and EBTCM
- Corroded / loose connectors or pin damage at PCM, EBTCM or splice points
- Failed PCM or EBTCM
- Blown fuse or poor battery/ground connections causing voltage irregularities
- Aftermarket electronics or modules loading/shorting the data bus
- Intermittent wiring damage (rubbed through, water intrusion, rodent damage)
Symptoms
- Malfunction Indicator Lamp (MIL) or ABS/Traction control warning lights
- Loss of traction control / stability control functions
- Intermittent or permanent loss of communication with EBTCM on scan tool
- Related drivability or braking system warnings
- Possible limp-in behavior if other modules lose PCM data
What to check
- Connect a capable scan tool; read all stored U/P codes and module presence/status
- Check battery voltage and main grounds; verify stable voltage (12.4–14.6 V with engine running)
- Inspect EBTCM and PCM connectors for corrosion, bent pins, water, or damage
- Check fuses and power feeds for PCM/EBTCM
- Wiggle/operate harness while watching live data or communication status for intermittent faults
- Use backprobe or scope to verify serial data activity on the bus at PCM and EBTCM
Signal parameters
- Vehicle may use GM Class 2 single-wire serial data or GMLAN/CAN — consult model-specific wiring manual
- Class 2: single-wire asynchronous pulses; expect periodic traffic when key ON/crank (no steady DC level)
- CAN (if used): differential idle ~2.5 V (both lines); active frames show opposing voltages — verify with scope
- No continuous short to battery or ground on the data line(s); resistance between data circuit and ground/battery should not be low
- Signal integrity: look for clean digital pulses, correct voltage swing, and no excessive noise or missing frames
Diagnostic algorithm
- Verify battery voltage and good engine/chassis grounds. Fix any charging or ground issues first.
- Use a scan tool and confirm P1573 along with any other communication codes. Note whether EBTCM is present/communicating.
- Clear codes and attempt to reproduce. If P1573 returns immediately, proceed to wiring checks.
- Visually inspect connectors and wiring between PCM and EBTCM for damage, corrosion, or water intrusion. Repair damaged wiring/connectors.
- Backprobe the serial data line(s) at the EBTCM and PCM. With a scope (preferred) or logic tool, verify valid data pulses/frames with key ON/crank.
- If no data or noisy signal, isolate by disconnecting aftermarket devices or non-essential modules on the same bus and re-test.
- Check continuity and resistance of the data wiring between PCM and EBTCM; look for opens, shorts to ground/power, or high resistance at connector terminals.
- If a short to ground/power is suspected, remove sections of harness or disconnect modules one at a time to locate the short.
- If wiring and power/grounds are good but communication still fails, swap or bench-test the EBTCM (if available) or replace with a known-good module and verify. Do not replace modules prematurely—confirm fault isolation first.
- After replacement of any module, program/configure per factory procedures and recheck for codes and proper communication.
Likely causes
- Damaged connector at EBTCM or PCM (water/corrosion)
- Open/short in single-wire serial bus or CAN wiring between the two modules
- Faulty EBTCM (common on vehicles with water intrusion in ABS module)
- Poor battery/ground causing module reset and lost communication
Fault status
Similar codes
P1573
PCM EBTCM Serial Data Circuit
Causes
- Open, short or high resistance in the serial data wiring between PCM and EBTCM
- Corroded / loose connectors or pin damage at PCM, EBTCM or splice points
- Failed PCM or EBTCM
- Blown fuse or poor battery/ground connections causing voltage irregularities
- Aftermarket electronics or modules loading/shorting the data bus
- Intermittent wiring damage (rubbed through, water intrusion, rodent damage)
Symptoms
- Malfunction Indicator Lamp (MIL) or ABS/Traction control warning lights
- Loss of traction control / stability control functions
- Intermittent or permanent loss of communication with EBTCM on scan tool
- Related drivability or braking system warnings
- Possible limp-in behavior if other modules lose PCM data
What to check
- Connect a capable scan tool; read all stored U/P codes and module presence/status
- Check battery voltage and main grounds; verify stable voltage (12.4–14.6 V with engine running)
- Inspect EBTCM and PCM connectors for corrosion, bent pins, water, or damage
- Check fuses and power feeds for PCM/EBTCM
- Wiggle/operate harness while watching live data or communication status for intermittent faults
- Use backprobe or scope to verify serial data activity on the bus at PCM and EBTCM
Signal parameters
- Vehicle may use GM Class 2 single-wire serial data or GMLAN/CAN — consult model-specific wiring manual
- Class 2: single-wire asynchronous pulses; expect periodic traffic when key ON/crank (no steady DC level)
- CAN (if used): differential idle ~2.5 V (both lines); active frames show opposing voltages — verify with scope
- No continuous short to battery or ground on the data line(s); resistance between data circuit and ground/battery should not be low
- Signal integrity: look for clean digital pulses, correct voltage swing, and no excessive noise or missing frames
Diagnostic algorithm
- Verify battery voltage and good engine/chassis grounds. Fix any charging or ground issues first.
- Use a scan tool and confirm P1573 along with any other communication codes. Note whether EBTCM is present/communicating.
- Clear codes and attempt to reproduce. If P1573 returns immediately, proceed to wiring checks.
- Visually inspect connectors and wiring between PCM and EBTCM for damage, corrosion, or water intrusion. Repair damaged wiring/connectors.
- Backprobe the serial data line(s) at the EBTCM and PCM. With a scope (preferred) or logic tool, verify valid data pulses/frames with key ON/crank.
- If no data or noisy signal, isolate by disconnecting aftermarket devices or non-essential modules on the same bus and re-test.
- Check continuity and resistance of the data wiring between PCM and EBTCM; look for opens, shorts to ground/power, or high resistance at connector terminals.
- If a short to ground/power is suspected, remove sections of harness or disconnect modules one at a time to locate the short.
- If wiring and power/grounds are good but communication still fails, swap or bench-test the EBTCM (if available) or replace with a known-good module and verify. Do not replace modules prematurely—confirm fault isolation first.
- After replacement of any module, program/configure per factory procedures and recheck for codes and proper communication.
Likely causes
- Damaged connector at EBTCM or PCM (water/corrosion)
- Open/short in single-wire serial bus or CAN wiring between the two modules
- Faulty EBTCM (common on vehicles with water intrusion in ABS module)
- Poor battery/ground causing module reset and lost communication
Fault status
Similar codes
P1573
PCM EBTCM Serial Data Circuit
Causes
- Open, short or high resistance in the serial data wiring between PCM and EBTCM
- Corroded / loose connectors or pin damage at PCM, EBTCM or splice points
- Failed PCM or EBTCM
- Blown fuse or poor battery/ground connections causing voltage irregularities
- Aftermarket electronics or modules loading/shorting the data bus
- Intermittent wiring damage (rubbed through, water intrusion, rodent damage)
Symptoms
- Malfunction Indicator Lamp (MIL) or ABS/Traction control warning lights
- Loss of traction control / stability control functions
- Intermittent or permanent loss of communication with EBTCM on scan tool
- Related drivability or braking system warnings
- Possible limp-in behavior if other modules lose PCM data
What to check
- Connect a capable scan tool; read all stored U/P codes and module presence/status
- Check battery voltage and main grounds; verify stable voltage (12.4–14.6 V with engine running)
- Inspect EBTCM and PCM connectors for corrosion, bent pins, water, or damage
- Check fuses and power feeds for PCM/EBTCM
- Wiggle/operate harness while watching live data or communication status for intermittent faults
- Use backprobe or scope to verify serial data activity on the bus at PCM and EBTCM
Signal parameters
- Vehicle may use GM Class 2 single-wire serial data or GMLAN/CAN — consult model-specific wiring manual
- Class 2: single-wire asynchronous pulses; expect periodic traffic when key ON/crank (no steady DC level)
- CAN (if used): differential idle ~2.5 V (both lines); active frames show opposing voltages — verify with scope
- No continuous short to battery or ground on the data line(s); resistance between data circuit and ground/battery should not be low
- Signal integrity: look for clean digital pulses, correct voltage swing, and no excessive noise or missing frames
Diagnostic algorithm
- Verify battery voltage and good engine/chassis grounds. Fix any charging or ground issues first.
- Use a scan tool and confirm P1573 along with any other communication codes. Note whether EBTCM is present/communicating.
- Clear codes and attempt to reproduce. If P1573 returns immediately, proceed to wiring checks.
- Visually inspect connectors and wiring between PCM and EBTCM for damage, corrosion, or water intrusion. Repair damaged wiring/connectors.
- Backprobe the serial data line(s) at the EBTCM and PCM. With a scope (preferred) or logic tool, verify valid data pulses/frames with key ON/crank.
- If no data or noisy signal, isolate by disconnecting aftermarket devices or non-essential modules on the same bus and re-test.
- Check continuity and resistance of the data wiring between PCM and EBTCM; look for opens, shorts to ground/power, or high resistance at connector terminals.
- If a short to ground/power is suspected, remove sections of harness or disconnect modules one at a time to locate the short.
- If wiring and power/grounds are good but communication still fails, swap or bench-test the EBTCM (if available) or replace with a known-good module and verify. Do not replace modules prematurely—confirm fault isolation first.
- After replacement of any module, program/configure per factory procedures and recheck for codes and proper communication.
Likely causes
- Damaged connector at EBTCM or PCM (water/corrosion)
- Open/short in single-wire serial bus or CAN wiring between the two modules
- Faulty EBTCM (common on vehicles with water intrusion in ABS module)
- Poor battery/ground causing module reset and lost communication
Fault status
Similar codes
P1573
PCM EBTCM Serial Data Circuit
Causes
- Open, short or high resistance in the serial data wiring between PCM and EBTCM
- Corroded / loose connectors or pin damage at PCM, EBTCM or splice points
- Failed PCM or EBTCM
- Blown fuse or poor battery/ground connections causing voltage irregularities
- Aftermarket electronics or modules loading/shorting the data bus
- Intermittent wiring damage (rubbed through, water intrusion, rodent damage)
Symptoms
- Malfunction Indicator Lamp (MIL) or ABS/Traction control warning lights
- Loss of traction control / stability control functions
- Intermittent or permanent loss of communication with EBTCM on scan tool
- Related drivability or braking system warnings
- Possible limp-in behavior if other modules lose PCM data
What to check
- Connect a capable scan tool; read all stored U/P codes and module presence/status
- Check battery voltage and main grounds; verify stable voltage (12.4–14.6 V with engine running)
- Inspect EBTCM and PCM connectors for corrosion, bent pins, water, or damage
- Check fuses and power feeds for PCM/EBTCM
- Wiggle/operate harness while watching live data or communication status for intermittent faults
- Use backprobe or scope to verify serial data activity on the bus at PCM and EBTCM
Signal parameters
- Vehicle may use GM Class 2 single-wire serial data or GMLAN/CAN — consult model-specific wiring manual
- Class 2: single-wire asynchronous pulses; expect periodic traffic when key ON/crank (no steady DC level)
- CAN (if used): differential idle ~2.5 V (both lines); active frames show opposing voltages — verify with scope
- No continuous short to battery or ground on the data line(s); resistance between data circuit and ground/battery should not be low
- Signal integrity: look for clean digital pulses, correct voltage swing, and no excessive noise or missing frames
Diagnostic algorithm
- Verify battery voltage and good engine/chassis grounds. Fix any charging or ground issues first.
- Use a scan tool and confirm P1573 along with any other communication codes. Note whether EBTCM is present/communicating.
- Clear codes and attempt to reproduce. If P1573 returns immediately, proceed to wiring checks.
- Visually inspect connectors and wiring between PCM and EBTCM for damage, corrosion, or water intrusion. Repair damaged wiring/connectors.
- Backprobe the serial data line(s) at the EBTCM and PCM. With a scope (preferred) or logic tool, verify valid data pulses/frames with key ON/crank.
- If no data or noisy signal, isolate by disconnecting aftermarket devices or non-essential modules on the same bus and re-test.
- Check continuity and resistance of the data wiring between PCM and EBTCM; look for opens, shorts to ground/power, or high resistance at connector terminals.
- If a short to ground/power is suspected, remove sections of harness or disconnect modules one at a time to locate the short.
- If wiring and power/grounds are good but communication still fails, swap or bench-test the EBTCM (if available) or replace with a known-good module and verify. Do not replace modules prematurely—confirm fault isolation first.
- After replacement of any module, program/configure per factory procedures and recheck for codes and proper communication.
Likely causes
- Damaged connector at EBTCM or PCM (water/corrosion)
- Open/short in single-wire serial bus or CAN wiring between the two modules
- Faulty EBTCM (common on vehicles with water intrusion in ABS module)
- Poor battery/ground causing module reset and lost communication
Fault status
Similar codes
P1573
Throttle Position Not Available
Causes
- Open, short or high resistance in the serial data wiring between PCM and EBTCM
- Corroded / loose connectors or pin damage at PCM, EBTCM or splice points
- Failed PCM or EBTCM
- Blown fuse or poor battery/ground connections causing voltage irregularities
- Aftermarket electronics or modules loading/shorting the data bus
- Intermittent wiring damage (rubbed through, water intrusion, rodent damage)
Symptoms
- Malfunction Indicator Lamp (MIL) or ABS/Traction control warning lights
- Loss of traction control / stability control functions
- Intermittent or permanent loss of communication with EBTCM on scan tool
- Related drivability or braking system warnings
- Possible limp-in behavior if other modules lose PCM data
What to check
- Connect a capable scan tool; read all stored U/P codes and module presence/status
- Check battery voltage and main grounds; verify stable voltage (12.4–14.6 V with engine running)
- Inspect EBTCM and PCM connectors for corrosion, bent pins, water, or damage
- Check fuses and power feeds for PCM/EBTCM
- Wiggle/operate harness while watching live data or communication status for intermittent faults
- Use backprobe or scope to verify serial data activity on the bus at PCM and EBTCM
Signal parameters
- Vehicle may use GM Class 2 single-wire serial data or GMLAN/CAN — consult model-specific wiring manual
- Class 2: single-wire asynchronous pulses; expect periodic traffic when key ON/crank (no steady DC level)
- CAN (if used): differential idle ~2.5 V (both lines); active frames show opposing voltages — verify with scope
- No continuous short to battery or ground on the data line(s); resistance between data circuit and ground/battery should not be low
- Signal integrity: look for clean digital pulses, correct voltage swing, and no excessive noise or missing frames
Diagnostic algorithm
- Verify battery voltage and good engine/chassis grounds. Fix any charging or ground issues first.
- Use a scan tool and confirm P1573 along with any other communication codes. Note whether EBTCM is present/communicating.
- Clear codes and attempt to reproduce. If P1573 returns immediately, proceed to wiring checks.
- Visually inspect connectors and wiring between PCM and EBTCM for damage, corrosion, or water intrusion. Repair damaged wiring/connectors.
- Backprobe the serial data line(s) at the EBTCM and PCM. With a scope (preferred) or logic tool, verify valid data pulses/frames with key ON/crank.
- If no data or noisy signal, isolate by disconnecting aftermarket devices or non-essential modules on the same bus and re-test.
- Check continuity and resistance of the data wiring between PCM and EBTCM; look for opens, shorts to ground/power, or high resistance at connector terminals.
- If a short to ground/power is suspected, remove sections of harness or disconnect modules one at a time to locate the short.
- If wiring and power/grounds are good but communication still fails, swap or bench-test the EBTCM (if available) or replace with a known-good module and verify. Do not replace modules prematurely—confirm fault isolation first.
- After replacement of any module, program/configure per factory procedures and recheck for codes and proper communication.
Likely causes
- Damaged connector at EBTCM or PCM (water/corrosion)
- Open/short in single-wire serial bus or CAN wiring between the two modules
- Faulty EBTCM (common on vehicles with water intrusion in ABS module)
- Poor battery/ground causing module reset and lost communication
Fault status
Similar codes
P1573
PCM EBTCM Serial Data Circuit
Causes
- Open, short or high resistance in the serial data wiring between PCM and EBTCM
- Corroded / loose connectors or pin damage at PCM, EBTCM or splice points
- Failed PCM or EBTCM
- Blown fuse or poor battery/ground connections causing voltage irregularities
- Aftermarket electronics or modules loading/shorting the data bus
- Intermittent wiring damage (rubbed through, water intrusion, rodent damage)
Symptoms
- Malfunction Indicator Lamp (MIL) or ABS/Traction control warning lights
- Loss of traction control / stability control functions
- Intermittent or permanent loss of communication with EBTCM on scan tool
- Related drivability or braking system warnings
- Possible limp-in behavior if other modules lose PCM data
What to check
- Connect a capable scan tool; read all stored U/P codes and module presence/status
- Check battery voltage and main grounds; verify stable voltage (12.4–14.6 V with engine running)
- Inspect EBTCM and PCM connectors for corrosion, bent pins, water, or damage
- Check fuses and power feeds for PCM/EBTCM
- Wiggle/operate harness while watching live data or communication status for intermittent faults
- Use backprobe or scope to verify serial data activity on the bus at PCM and EBTCM
Signal parameters
- Vehicle may use GM Class 2 single-wire serial data or GMLAN/CAN — consult model-specific wiring manual
- Class 2: single-wire asynchronous pulses; expect periodic traffic when key ON/crank (no steady DC level)
- CAN (if used): differential idle ~2.5 V (both lines); active frames show opposing voltages — verify with scope
- No continuous short to battery or ground on the data line(s); resistance between data circuit and ground/battery should not be low
- Signal integrity: look for clean digital pulses, correct voltage swing, and no excessive noise or missing frames
Diagnostic algorithm
- Verify battery voltage and good engine/chassis grounds. Fix any charging or ground issues first.
- Use a scan tool and confirm P1573 along with any other communication codes. Note whether EBTCM is present/communicating.
- Clear codes and attempt to reproduce. If P1573 returns immediately, proceed to wiring checks.
- Visually inspect connectors and wiring between PCM and EBTCM for damage, corrosion, or water intrusion. Repair damaged wiring/connectors.
- Backprobe the serial data line(s) at the EBTCM and PCM. With a scope (preferred) or logic tool, verify valid data pulses/frames with key ON/crank.
- If no data or noisy signal, isolate by disconnecting aftermarket devices or non-essential modules on the same bus and re-test.
- Check continuity and resistance of the data wiring between PCM and EBTCM; look for opens, shorts to ground/power, or high resistance at connector terminals.
- If a short to ground/power is suspected, remove sections of harness or disconnect modules one at a time to locate the short.
- If wiring and power/grounds are good but communication still fails, swap or bench-test the EBTCM (if available) or replace with a known-good module and verify. Do not replace modules prematurely—confirm fault isolation first.
- After replacement of any module, program/configure per factory procedures and recheck for codes and proper communication.
Likely causes
- Damaged connector at EBTCM or PCM (water/corrosion)
- Open/short in single-wire serial bus or CAN wiring between the two modules
- Faulty EBTCM (common on vehicles with water intrusion in ABS module)
- Poor battery/ground causing module reset and lost communication
Fault status
Similar codes
P1573
PCM EBTCM Serial Data Circuit
Causes
- Open, short or high resistance in the serial data wiring between PCM and EBTCM
- Corroded / loose connectors or pin damage at PCM, EBTCM or splice points
- Failed PCM or EBTCM
- Blown fuse or poor battery/ground connections causing voltage irregularities
- Aftermarket electronics or modules loading/shorting the data bus
- Intermittent wiring damage (rubbed through, water intrusion, rodent damage)
Symptoms
- Malfunction Indicator Lamp (MIL) or ABS/Traction control warning lights
- Loss of traction control / stability control functions
- Intermittent or permanent loss of communication with EBTCM on scan tool
- Related drivability or braking system warnings
- Possible limp-in behavior if other modules lose PCM data
What to check
- Connect a capable scan tool; read all stored U/P codes and module presence/status
- Check battery voltage and main grounds; verify stable voltage (12.4–14.6 V with engine running)
- Inspect EBTCM and PCM connectors for corrosion, bent pins, water, or damage
- Check fuses and power feeds for PCM/EBTCM
- Wiggle/operate harness while watching live data or communication status for intermittent faults
- Use backprobe or scope to verify serial data activity on the bus at PCM and EBTCM
Signal parameters
- Vehicle may use GM Class 2 single-wire serial data or GMLAN/CAN — consult model-specific wiring manual
- Class 2: single-wire asynchronous pulses; expect periodic traffic when key ON/crank (no steady DC level)
- CAN (if used): differential idle ~2.5 V (both lines); active frames show opposing voltages — verify with scope
- No continuous short to battery or ground on the data line(s); resistance between data circuit and ground/battery should not be low
- Signal integrity: look for clean digital pulses, correct voltage swing, and no excessive noise or missing frames
Diagnostic algorithm
- Verify battery voltage and good engine/chassis grounds. Fix any charging or ground issues first.
- Use a scan tool and confirm P1573 along with any other communication codes. Note whether EBTCM is present/communicating.
- Clear codes and attempt to reproduce. If P1573 returns immediately, proceed to wiring checks.
- Visually inspect connectors and wiring between PCM and EBTCM for damage, corrosion, or water intrusion. Repair damaged wiring/connectors.
- Backprobe the serial data line(s) at the EBTCM and PCM. With a scope (preferred) or logic tool, verify valid data pulses/frames with key ON/crank.
- If no data or noisy signal, isolate by disconnecting aftermarket devices or non-essential modules on the same bus and re-test.
- Check continuity and resistance of the data wiring between PCM and EBTCM; look for opens, shorts to ground/power, or high resistance at connector terminals.
- If a short to ground/power is suspected, remove sections of harness or disconnect modules one at a time to locate the short.
- If wiring and power/grounds are good but communication still fails, swap or bench-test the EBTCM (if available) or replace with a known-good module and verify. Do not replace modules prematurely—confirm fault isolation first.
- After replacement of any module, program/configure per factory procedures and recheck for codes and proper communication.
Likely causes
- Damaged connector at EBTCM or PCM (water/corrosion)
- Open/short in single-wire serial bus or CAN wiring between the two modules
- Faulty EBTCM (common on vehicles with water intrusion in ABS module)
- Poor battery/ground causing module reset and lost communication
Fault status
Similar codes
P1573
PCM/EBTCM Serial Data Circuit
Causes
- Open, short or high resistance in the serial data wiring between PCM and EBTCM
- Corroded / loose connectors or pin damage at PCM, EBTCM or splice points
- Failed PCM or EBTCM
- Blown fuse or poor battery/ground connections causing voltage irregularities
- Aftermarket electronics or modules loading/shorting the data bus
- Intermittent wiring damage (rubbed through, water intrusion, rodent damage)
Symptoms
- Malfunction Indicator Lamp (MIL) or ABS/Traction control warning lights
- Loss of traction control / stability control functions
- Intermittent or permanent loss of communication with EBTCM on scan tool
- Related drivability or braking system warnings
- Possible limp-in behavior if other modules lose PCM data
What to check
- Connect a capable scan tool; read all stored U/P codes and module presence/status
- Check battery voltage and main grounds; verify stable voltage (12.4–14.6 V with engine running)
- Inspect EBTCM and PCM connectors for corrosion, bent pins, water, or damage
- Check fuses and power feeds for PCM/EBTCM
- Wiggle/operate harness while watching live data or communication status for intermittent faults
- Use backprobe or scope to verify serial data activity on the bus at PCM and EBTCM
Signal parameters
- Vehicle may use GM Class 2 single-wire serial data or GMLAN/CAN — consult model-specific wiring manual
- Class 2: single-wire asynchronous pulses; expect periodic traffic when key ON/crank (no steady DC level)
- CAN (if used): differential idle ~2.5 V (both lines); active frames show opposing voltages — verify with scope
- No continuous short to battery or ground on the data line(s); resistance between data circuit and ground/battery should not be low
- Signal integrity: look for clean digital pulses, correct voltage swing, and no excessive noise or missing frames
Diagnostic algorithm
- Verify battery voltage and good engine/chassis grounds. Fix any charging or ground issues first.
- Use a scan tool and confirm P1573 along with any other communication codes. Note whether EBTCM is present/communicating.
- Clear codes and attempt to reproduce. If P1573 returns immediately, proceed to wiring checks.
- Visually inspect connectors and wiring between PCM and EBTCM for damage, corrosion, or water intrusion. Repair damaged wiring/connectors.
- Backprobe the serial data line(s) at the EBTCM and PCM. With a scope (preferred) or logic tool, verify valid data pulses/frames with key ON/crank.
- If no data or noisy signal, isolate by disconnecting aftermarket devices or non-essential modules on the same bus and re-test.
- Check continuity and resistance of the data wiring between PCM and EBTCM; look for opens, shorts to ground/power, or high resistance at connector terminals.
- If a short to ground/power is suspected, remove sections of harness or disconnect modules one at a time to locate the short.
- If wiring and power/grounds are good but communication still fails, swap or bench-test the EBTCM (if available) or replace with a known-good module and verify. Do not replace modules prematurely—confirm fault isolation first.
- After replacement of any module, program/configure per factory procedures and recheck for codes and proper communication.
Likely causes
- Damaged connector at EBTCM or PCM (water/corrosion)
- Open/short in single-wire serial bus or CAN wiring between the two modules
- Faulty EBTCM (common on vehicles with water intrusion in ABS module)
- Poor battery/ground causing module reset and lost communication
Fault status
Similar codes
Manual library for HUMMER
Browse 138 HUMMER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
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P1573
Throttle position sensor not available
Causes
- Open, short or high resistance in the serial data wiring between PCM and EBTCM
- Corroded / loose connectors or pin damage at PCM, EBTCM or splice points
- Failed PCM or EBTCM
- Blown fuse or poor battery/ground connections causing voltage irregularities
- Aftermarket electronics or modules loading/shorting the data bus
- Intermittent wiring damage (rubbed through, water intrusion, rodent damage)
Symptoms
- Malfunction Indicator Lamp (MIL) or ABS/Traction control warning lights
- Loss of traction control / stability control functions
- Intermittent or permanent loss of communication with EBTCM on scan tool
- Related drivability or braking system warnings
- Possible limp-in behavior if other modules lose PCM data
What to check
- Connect a capable scan tool; read all stored U/P codes and module presence/status
- Check battery voltage and main grounds; verify stable voltage (12.4–14.6 V with engine running)
- Inspect EBTCM and PCM connectors for corrosion, bent pins, water, or damage
- Check fuses and power feeds for PCM/EBTCM
- Wiggle/operate harness while watching live data or communication status for intermittent faults
- Use backprobe or scope to verify serial data activity on the bus at PCM and EBTCM
Signal parameters
- Vehicle may use GM Class 2 single-wire serial data or GMLAN/CAN — consult model-specific wiring manual
- Class 2: single-wire asynchronous pulses; expect periodic traffic when key ON/crank (no steady DC level)
- CAN (if used): differential idle ~2.5 V (both lines); active frames show opposing voltages — verify with scope
- No continuous short to battery or ground on the data line(s); resistance between data circuit and ground/battery should not be low
- Signal integrity: look for clean digital pulses, correct voltage swing, and no excessive noise or missing frames
Diagnostic algorithm
- Verify battery voltage and good engine/chassis grounds. Fix any charging or ground issues first.
- Use a scan tool and confirm P1573 along with any other communication codes. Note whether EBTCM is present/communicating.
- Clear codes and attempt to reproduce. If P1573 returns immediately, proceed to wiring checks.
- Visually inspect connectors and wiring between PCM and EBTCM for damage, corrosion, or water intrusion. Repair damaged wiring/connectors.
- Backprobe the serial data line(s) at the EBTCM and PCM. With a scope (preferred) or logic tool, verify valid data pulses/frames with key ON/crank.
- If no data or noisy signal, isolate by disconnecting aftermarket devices or non-essential modules on the same bus and re-test.
- Check continuity and resistance of the data wiring between PCM and EBTCM; look for opens, shorts to ground/power, or high resistance at connector terminals.
- If a short to ground/power is suspected, remove sections of harness or disconnect modules one at a time to locate the short.
- If wiring and power/grounds are good but communication still fails, swap or bench-test the EBTCM (if available) or replace with a known-good module and verify. Do not replace modules prematurely—confirm fault isolation first.
- After replacement of any module, program/configure per factory procedures and recheck for codes and proper communication.
Likely causes
- Damaged connector at EBTCM or PCM (water/corrosion)
- Open/short in single-wire serial bus or CAN wiring between the two modules
- Faulty EBTCM (common on vehicles with water intrusion in ABS module)
- Poor battery/ground causing module reset and lost communication
Fault status
Similar codes
Manual library for LAND ROVER
Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
LAND ROVER
-
LAND ROVER: 2022
-
Defender
- 90
- 90
- 90 S
- 90 S
- 90 V8
- 90 V8
- 90 V8 Carpathian Edition
- 90 V8 Carpathian Edition
- 90 X
- 90 X
- 90 X-Dynamic HSE
- 90 X-Dynamic HSE
- 90 X-Dynamic S
- 90 X-Dynamic S
- 90 X-Dynamic SE
- 90 X-Dynamic SE
- 110
- 110
- 110 S
- 110 S
- 110 SE
- 110 SE
- 110 V8
- 110 V8
- 110 V8 Carpathian Edition
- 110 V8 Carpathian Edition
- 110 X
- 110 X
- 110 X-Dynamic SE
- 110 X-Dynamic SE
- 110 XS Edition
- 110 XS Edition
-
Discovery
- R-Dynamic HSE
- R-Dynamic HSE
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Discovery R-Dynamic S
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Discovery R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Discovery R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Discovery R-Dynamic S
- S
- S
-
Discovery Sport
-
Range Rover
- Autobiography, 4.4L Eng VIN 7 · 4.4L Eng VIN 72022: Range Rover Autobiography
- Autobiography, 4.4L Eng VIN 7 · 4.4L Eng VIN 72022: Range Rover Autobiography
- Autobiography, 5.0L Eng VIN E · 5.0L Eng VIN E2022: Range Rover Autobiography
- Autobiography, 5.0L Eng VIN E · 5.0L Eng VIN E2022: Range Rover Autobiography
- 2022 Range Rover Base
- 2022 Range Rover Base
- First Edition
- First Edition
- HSE Westminster, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover HSE Westminster
- HSE Westminster, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover HSE Westminster
- HSE Westminster, 5.0L Eng VIN E · 5.0L Eng VIN E2022: Range Rover HSE Westminster
- HSE Westminster, 5.0L Eng VIN E · 5.0L Eng VIN E2022: Range Rover HSE Westminster
- SE, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover SE
- SE, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover SE
- SE, 4.4L Eng VIN 7 · 4.4L Eng VIN 72022: Range Rover SE
- SE, 4.4L Eng VIN 7 · 4.4L Eng VIN 72022: Range Rover SE
- SV
- SV
- SVAutobiography
- SVAutobiography
- SVAutobiography Dynamic
- SVAutobiography Dynamic
- SVAutobiography Dynamic Blk.
- SVAutobiography Dynamic Blk.
-
Range Rover Evoque
-
Range Rover Velar
- R-Dynamic HSE
- R-Dynamic HSE
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Range Rover Velar R-Dynamic S
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover Velar R-Dynamic S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Range Rover Velar S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Range Rover Velar S
- S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover Velar S
- S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover Velar S
-
-
LAND ROVER: 2021
-
Discovery
- R-Dynamic HSE
- R-Dynamic HSE
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Discovery R-Dynamic S
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Discovery R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Discovery R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Discovery R-Dynamic S
- S
- S
-
Discovery Sport
-
Range Rover
- Autobiography, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Autobiography
- Autobiography, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Autobiography
- Autobiography Fifty Edition
- Autobiography Fifty Edition
- 2021 Range Rover Base
- 2021 Range Rover Base
- HSE, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover HSE
- HSE, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2021: Range Rover HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2021: Range Rover HSE
- HSE Westminster, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover HSE Westminster
- HSE Westminster, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover HSE Westminster
- HSE Westminster, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover HSE Westminster
- HSE Westminster, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover HSE Westminster
- SVAutobiography
- SVAutobiography
- SVAutobiography Dynamic
- SVAutobiography Dynamic
- SVAutobiography Dynamic Blk.
- SVAutobiography Dynamic Blk.
-
Range Rover Evoque
-
Range Rover Sport
- Autobiography, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport Autobiography
- Autobiography, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport Autobiography
- Autobiography, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover Sport Autobiography
- Autobiography, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover Sport Autobiography
- Autobiography Dynamic, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover Sport Autobiography Dynamic
- HSE Dynamic
- HSE Dynamic
- HSE Silver Edition, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport HSE Silver Edition
- HSE Silver Edition, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport HSE Silver Edition
- HSE Silver Edition, 3.0L Eng VIN K · 3.0L Eng VIN K2021: Range Rover Sport HSE Silver Edition
- HSE Silver Edition, 3.0L Eng VIN K · 3.0L Eng VIN K2021: Range Rover Sport HSE Silver Edition
- HSE Silver Edition, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Sport HSE Silver Edition
- HSE Silver Edition, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Sport HSE Silver Edition
- HST
- HST
- SE
- SE
- SVR
- SVR
- SVR Carbon Edition
- SVR Carbon Edition
-
Range Rover Velar
- R-Dynamic HSE
- R-Dynamic HSE
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Range Rover Velar R-Dynamic S
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Velar R-Dynamic S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Range Rover Velar S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Range Rover Velar S
- S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Velar S
- S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Velar S
-
LAND ROVER: 2020
-
Defender
- 90 First Edition
- 90 First Edition
- 110 First Edition
- 110 First Edition
- 110 HSE
- 110 HSE
- 110 S
- 110 S
- 110 SE
- 110 SE
- 110 X
- 110 X
- 110, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Defender 110
- 110, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Defender 110
- 110, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Defender 110
- 110, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Defender 110
-
Discovery
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery HSE
- HSE, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery HSE
- HSE, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery HSE
- HSE Luxury, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery HSE Luxury
- HSE Luxury, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery HSE Luxury
- HSE Luxury, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery HSE Luxury
- HSE Luxury, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery HSE Luxury
- Landmark
- Landmark
- SE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery SE
- SE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery SE
- SE, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery SE
- SE, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery SE
-
Range Rover
- Autobiography
- Autobiography
- Base, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Base
- Base, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Base
- Base, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Base
- Base, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Base
- HSE, 2.0L Eng VIN Y · 2.0L Eng VIN Y2020: Range Rover HSE
- HSE, 2.0L Eng VIN Y · 2.0L Eng VIN Y2020: Range Rover HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover HSE
- HSE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover HSE
- HSE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover HSE
- HSE, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover HSE
- HSE, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover HSE
- SVAutobiography
- SVAutobiography
- SVAutobiography Dynamic
- SVAutobiography Dynamic
-
Range Rover Evoque
-
Range Rover Sport
- Autobiography Dynamic, 2.0L Eng VIN Y · 2.0L Eng VIN Y2020: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 2.0L Eng VIN Y · 2.0L Eng VIN Y2020: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover Sport Autobiography Dynamic
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Sport HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Sport HSE
- HSE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Sport HSE
- HSE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Sport HSE
- HSE, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover Sport HSE
- HSE, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover Sport HSE
- HSE Dynamic
- HSE Dynamic
- HSE PHEV
- HSE PHEV
- HST
- HST
- SE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Sport SE
- SE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Sport SE
- SE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Sport SE
- SE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Sport SE
- SVR
- SVR
-
Range Rover Velar
- R-Dynamic HSE
- R-Dynamic HSE
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Range Rover Velar R-Dynamic S
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Range Rover Velar R-Dynamic S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Range Rover Velar S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Range Rover Velar S
- S, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Range Rover Velar S
- S, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Range Rover Velar S
- SVAutobiography Dyn.
- SVAutobiography Dyn.
-
P1573
Throttle Position Not Available
Causes
- Open, short or high resistance in the serial data wiring between PCM and EBTCM
- Corroded / loose connectors or pin damage at PCM, EBTCM or splice points
- Failed PCM or EBTCM
- Blown fuse or poor battery/ground connections causing voltage irregularities
- Aftermarket electronics or modules loading/shorting the data bus
- Intermittent wiring damage (rubbed through, water intrusion, rodent damage)
Symptoms
- Malfunction Indicator Lamp (MIL) or ABS/Traction control warning lights
- Loss of traction control / stability control functions
- Intermittent or permanent loss of communication with EBTCM on scan tool
- Related drivability or braking system warnings
- Possible limp-in behavior if other modules lose PCM data
What to check
- Connect a capable scan tool; read all stored U/P codes and module presence/status
- Check battery voltage and main grounds; verify stable voltage (12.4–14.6 V with engine running)
- Inspect EBTCM and PCM connectors for corrosion, bent pins, water, or damage
- Check fuses and power feeds for PCM/EBTCM
- Wiggle/operate harness while watching live data or communication status for intermittent faults
- Use backprobe or scope to verify serial data activity on the bus at PCM and EBTCM
Signal parameters
- Vehicle may use GM Class 2 single-wire serial data or GMLAN/CAN — consult model-specific wiring manual
- Class 2: single-wire asynchronous pulses; expect periodic traffic when key ON/crank (no steady DC level)
- CAN (if used): differential idle ~2.5 V (both lines); active frames show opposing voltages — verify with scope
- No continuous short to battery or ground on the data line(s); resistance between data circuit and ground/battery should not be low
- Signal integrity: look for clean digital pulses, correct voltage swing, and no excessive noise or missing frames
Diagnostic algorithm
- Verify battery voltage and good engine/chassis grounds. Fix any charging or ground issues first.
- Use a scan tool and confirm P1573 along with any other communication codes. Note whether EBTCM is present/communicating.
- Clear codes and attempt to reproduce. If P1573 returns immediately, proceed to wiring checks.
- Visually inspect connectors and wiring between PCM and EBTCM for damage, corrosion, or water intrusion. Repair damaged wiring/connectors.
- Backprobe the serial data line(s) at the EBTCM and PCM. With a scope (preferred) or logic tool, verify valid data pulses/frames with key ON/crank.
- If no data or noisy signal, isolate by disconnecting aftermarket devices or non-essential modules on the same bus and re-test.
- Check continuity and resistance of the data wiring between PCM and EBTCM; look for opens, shorts to ground/power, or high resistance at connector terminals.
- If a short to ground/power is suspected, remove sections of harness or disconnect modules one at a time to locate the short.
- If wiring and power/grounds are good but communication still fails, swap or bench-test the EBTCM (if available) or replace with a known-good module and verify. Do not replace modules prematurely—confirm fault isolation first.
- After replacement of any module, program/configure per factory procedures and recheck for codes and proper communication.
Likely causes
- Damaged connector at EBTCM or PCM (water/corrosion)
- Open/short in single-wire serial bus or CAN wiring between the two modules
- Faulty EBTCM (common on vehicles with water intrusion in ABS module)
- Poor battery/ground causing module reset and lost communication
Fault status
Similar codes
Manual library for LINCOLN
Browse 166 LINCOLN manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
LINCOLN
-
LINCOLN: 2024
-
LINCOLN: 2023
-
LINCOLN: 2022
-
LINCOLN: 2021
-
LINCOLN: 2020
-
Continental
- Base, AWD
- Base, FWD
- Black Label, 2.7L Eng VIN P · 2.7L Eng VIN P2020: Continental Black Label
- Black Label, 3.0L Eng VIN C · 3.0L Eng VIN C2020: Continental Black Label
- Livery, AWD
- Livery, FWD
- Reserve, 2.7L Eng VIN P, AWD
- Reserve, 2.7L Eng VIN P, FWD
- Reserve, 3.0L Eng VIN C · 3.0L Eng VIN C2020: Continental Reserve
P1573
Throttle Position Not Available
Causes
- Open, short or high resistance in the serial data wiring between PCM and EBTCM
- Corroded / loose connectors or pin damage at PCM, EBTCM or splice points
- Failed PCM or EBTCM
- Blown fuse or poor battery/ground connections causing voltage irregularities
- Aftermarket electronics or modules loading/shorting the data bus
- Intermittent wiring damage (rubbed through, water intrusion, rodent damage)
Symptoms
- Malfunction Indicator Lamp (MIL) or ABS/Traction control warning lights
- Loss of traction control / stability control functions
- Intermittent or permanent loss of communication with EBTCM on scan tool
- Related drivability or braking system warnings
- Possible limp-in behavior if other modules lose PCM data
What to check
- Connect a capable scan tool; read all stored U/P codes and module presence/status
- Check battery voltage and main grounds; verify stable voltage (12.4–14.6 V with engine running)
- Inspect EBTCM and PCM connectors for corrosion, bent pins, water, or damage
- Check fuses and power feeds for PCM/EBTCM
- Wiggle/operate harness while watching live data or communication status for intermittent faults
- Use backprobe or scope to verify serial data activity on the bus at PCM and EBTCM
Signal parameters
- Vehicle may use GM Class 2 single-wire serial data or GMLAN/CAN — consult model-specific wiring manual
- Class 2: single-wire asynchronous pulses; expect periodic traffic when key ON/crank (no steady DC level)
- CAN (if used): differential idle ~2.5 V (both lines); active frames show opposing voltages — verify with scope
- No continuous short to battery or ground on the data line(s); resistance between data circuit and ground/battery should not be low
- Signal integrity: look for clean digital pulses, correct voltage swing, and no excessive noise or missing frames
Diagnostic algorithm
- Verify battery voltage and good engine/chassis grounds. Fix any charging or ground issues first.
- Use a scan tool and confirm P1573 along with any other communication codes. Note whether EBTCM is present/communicating.
- Clear codes and attempt to reproduce. If P1573 returns immediately, proceed to wiring checks.
- Visually inspect connectors and wiring between PCM and EBTCM for damage, corrosion, or water intrusion. Repair damaged wiring/connectors.
- Backprobe the serial data line(s) at the EBTCM and PCM. With a scope (preferred) or logic tool, verify valid data pulses/frames with key ON/crank.
- If no data or noisy signal, isolate by disconnecting aftermarket devices or non-essential modules on the same bus and re-test.
- Check continuity and resistance of the data wiring between PCM and EBTCM; look for opens, shorts to ground/power, or high resistance at connector terminals.
- If a short to ground/power is suspected, remove sections of harness or disconnect modules one at a time to locate the short.
- If wiring and power/grounds are good but communication still fails, swap or bench-test the EBTCM (if available) or replace with a known-good module and verify. Do not replace modules prematurely—confirm fault isolation first.
- After replacement of any module, program/configure per factory procedures and recheck for codes and proper communication.
Likely causes
- Damaged connector at EBTCM or PCM (water/corrosion)
- Open/short in single-wire serial bus or CAN wiring between the two modules
- Faulty EBTCM (common on vehicles with water intrusion in ABS module)
- Poor battery/ground causing module reset and lost communication
Fault status
Similar codes
Manual library for MERCURY
Browse 296 MERCURY manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
MERCURY
-
MERCURY: 2011
-
MERCURY: 2010
-
Mountaineer
-
MERCURY: 2009
-
Mountaineer
-
MERCURY: 2008
-
Mountaineer
-
MERCURY: 2007
-
Montego
-
Monterey
-
Mountaineer
-
MERCURY: 2006
-
Montego
-
Monterey
-
Mountaineer
-
MERCURY: 2005
-
Grand Marquis
-
Mariner
-
Montego
-
Monterey
-
Mountaineer
-
-
MERCURY: 2004
-
Marauder
-
Monterey
-
Mountaineer
-
MERCURY: 2003
-
Marauder
-
Mountaineer
-
MERCURY: 2002
-
Cougar
-
Mountaineer
-
Sable
-
Villager
-
-
MERCURY: 2001
-
Mountaineer
-
Sable
- GS, 4D Sedan, 3.0 2, 4F50N
- GS, 4D Sedan, 3.0 2, AX4S
- GS, 4D Sedan, 3.0 S
- GS, 4D Sedan, 3.0 U, 4F50N
- GS, 4D Sedan, 3.0 U, AX4S
- GS, 4D Wagon, 3.0 2, 4F50N
- GS, 4D Wagon, 3.0 2, AX4S
- GS, 4D Wagon, 3.0 U, 4F50N
- GS, 4D Wagon, 3.0 U, AX4S
- LS, 4D Sedan, 3.0 2
- LS, 4D Sedan, 3.0 S
- LS, 4D Sedan, 3.0 U, 4F50N
- LS, 4D Sedan, 3.0 U, AX4S
- LS, 4D Wagon, 3.0 S
- LS, 4D Wagon, 3.0 U, 4F50N
- LS, 4D Wagon, 3.0 U, AX4S
-
Villager
-
MERCURY: 2000
-
Cougar
-
Mountaineer
-
Villager
-
P1573
Engine control module (ECM), sensor supply circuit B - low output
Causes
- Open, short or high resistance in the serial data wiring between PCM and EBTCM
- Corroded / loose connectors or pin damage at PCM, EBTCM or splice points
- Failed PCM or EBTCM
- Blown fuse or poor battery/ground connections causing voltage irregularities
- Aftermarket electronics or modules loading/shorting the data bus
- Intermittent wiring damage (rubbed through, water intrusion, rodent damage)
Symptoms
- Malfunction Indicator Lamp (MIL) or ABS/Traction control warning lights
- Loss of traction control / stability control functions
- Intermittent or permanent loss of communication with EBTCM on scan tool
- Related drivability or braking system warnings
- Possible limp-in behavior if other modules lose PCM data
What to check
- Connect a capable scan tool; read all stored U/P codes and module presence/status
- Check battery voltage and main grounds; verify stable voltage (12.4–14.6 V with engine running)
- Inspect EBTCM and PCM connectors for corrosion, bent pins, water, or damage
- Check fuses and power feeds for PCM/EBTCM
- Wiggle/operate harness while watching live data or communication status for intermittent faults
- Use backprobe or scope to verify serial data activity on the bus at PCM and EBTCM
Signal parameters
- Vehicle may use GM Class 2 single-wire serial data or GMLAN/CAN — consult model-specific wiring manual
- Class 2: single-wire asynchronous pulses; expect periodic traffic when key ON/crank (no steady DC level)
- CAN (if used): differential idle ~2.5 V (both lines); active frames show opposing voltages — verify with scope
- No continuous short to battery or ground on the data line(s); resistance between data circuit and ground/battery should not be low
- Signal integrity: look for clean digital pulses, correct voltage swing, and no excessive noise or missing frames
Diagnostic algorithm
- Verify battery voltage and good engine/chassis grounds. Fix any charging or ground issues first.
- Use a scan tool and confirm P1573 along with any other communication codes. Note whether EBTCM is present/communicating.
- Clear codes and attempt to reproduce. If P1573 returns immediately, proceed to wiring checks.
- Visually inspect connectors and wiring between PCM and EBTCM for damage, corrosion, or water intrusion. Repair damaged wiring/connectors.
- Backprobe the serial data line(s) at the EBTCM and PCM. With a scope (preferred) or logic tool, verify valid data pulses/frames with key ON/crank.
- If no data or noisy signal, isolate by disconnecting aftermarket devices or non-essential modules on the same bus and re-test.
- Check continuity and resistance of the data wiring between PCM and EBTCM; look for opens, shorts to ground/power, or high resistance at connector terminals.
- If a short to ground/power is suspected, remove sections of harness or disconnect modules one at a time to locate the short.
- If wiring and power/grounds are good but communication still fails, swap or bench-test the EBTCM (if available) or replace with a known-good module and verify. Do not replace modules prematurely—confirm fault isolation first.
- After replacement of any module, program/configure per factory procedures and recheck for codes and proper communication.
Likely causes
- Damaged connector at EBTCM or PCM (water/corrosion)
- Open/short in single-wire serial bus or CAN wiring between the two modules
- Faulty EBTCM (common on vehicles with water intrusion in ABS module)
- Poor battery/ground causing module reset and lost communication
Fault status
Similar codes
P1573
PCM EBTCM Serial Data Circuit
Causes
- Open, short or high resistance in the serial data wiring between PCM and EBTCM
- Corroded / loose connectors or pin damage at PCM, EBTCM or splice points
- Failed PCM or EBTCM
- Blown fuse or poor battery/ground connections causing voltage irregularities
- Aftermarket electronics or modules loading/shorting the data bus
- Intermittent wiring damage (rubbed through, water intrusion, rodent damage)
Symptoms
- Malfunction Indicator Lamp (MIL) or ABS/Traction control warning lights
- Loss of traction control / stability control functions
- Intermittent or permanent loss of communication with EBTCM on scan tool
- Related drivability or braking system warnings
- Possible limp-in behavior if other modules lose PCM data
What to check
- Connect a capable scan tool; read all stored U/P codes and module presence/status
- Check battery voltage and main grounds; verify stable voltage (12.4–14.6 V with engine running)
- Inspect EBTCM and PCM connectors for corrosion, bent pins, water, or damage
- Check fuses and power feeds for PCM/EBTCM
- Wiggle/operate harness while watching live data or communication status for intermittent faults
- Use backprobe or scope to verify serial data activity on the bus at PCM and EBTCM
Signal parameters
- Vehicle may use GM Class 2 single-wire serial data or GMLAN/CAN — consult model-specific wiring manual
- Class 2: single-wire asynchronous pulses; expect periodic traffic when key ON/crank (no steady DC level)
- CAN (if used): differential idle ~2.5 V (both lines); active frames show opposing voltages — verify with scope
- No continuous short to battery or ground on the data line(s); resistance between data circuit and ground/battery should not be low
- Signal integrity: look for clean digital pulses, correct voltage swing, and no excessive noise or missing frames
Diagnostic algorithm
- Verify battery voltage and good engine/chassis grounds. Fix any charging or ground issues first.
- Use a scan tool and confirm P1573 along with any other communication codes. Note whether EBTCM is present/communicating.
- Clear codes and attempt to reproduce. If P1573 returns immediately, proceed to wiring checks.
- Visually inspect connectors and wiring between PCM and EBTCM for damage, corrosion, or water intrusion. Repair damaged wiring/connectors.
- Backprobe the serial data line(s) at the EBTCM and PCM. With a scope (preferred) or logic tool, verify valid data pulses/frames with key ON/crank.
- If no data or noisy signal, isolate by disconnecting aftermarket devices or non-essential modules on the same bus and re-test.
- Check continuity and resistance of the data wiring between PCM and EBTCM; look for opens, shorts to ground/power, or high resistance at connector terminals.
- If a short to ground/power is suspected, remove sections of harness or disconnect modules one at a time to locate the short.
- If wiring and power/grounds are good but communication still fails, swap or bench-test the EBTCM (if available) or replace with a known-good module and verify. Do not replace modules prematurely—confirm fault isolation first.
- After replacement of any module, program/configure per factory procedures and recheck for codes and proper communication.
Likely causes
- Damaged connector at EBTCM or PCM (water/corrosion)
- Open/short in single-wire serial bus or CAN wiring between the two modules
- Faulty EBTCM (common on vehicles with water intrusion in ABS module)
- Poor battery/ground causing module reset and lost communication
Fault status
Similar codes
P1573
Throttle Position Not Available
Causes
- Open, short or high resistance in the serial data wiring between PCM and EBTCM
- Corroded / loose connectors or pin damage at PCM, EBTCM or splice points
- Failed PCM or EBTCM
- Blown fuse or poor battery/ground connections causing voltage irregularities
- Aftermarket electronics or modules loading/shorting the data bus
- Intermittent wiring damage (rubbed through, water intrusion, rodent damage)
Symptoms
- Malfunction Indicator Lamp (MIL) or ABS/Traction control warning lights
- Loss of traction control / stability control functions
- Intermittent or permanent loss of communication with EBTCM on scan tool
- Related drivability or braking system warnings
- Possible limp-in behavior if other modules lose PCM data
What to check
- Connect a capable scan tool; read all stored U/P codes and module presence/status
- Check battery voltage and main grounds; verify stable voltage (12.4–14.6 V with engine running)
- Inspect EBTCM and PCM connectors for corrosion, bent pins, water, or damage
- Check fuses and power feeds for PCM/EBTCM
- Wiggle/operate harness while watching live data or communication status for intermittent faults
- Use backprobe or scope to verify serial data activity on the bus at PCM and EBTCM
Signal parameters
- Vehicle may use GM Class 2 single-wire serial data or GMLAN/CAN — consult model-specific wiring manual
- Class 2: single-wire asynchronous pulses; expect periodic traffic when key ON/crank (no steady DC level)
- CAN (if used): differential idle ~2.5 V (both lines); active frames show opposing voltages — verify with scope
- No continuous short to battery or ground on the data line(s); resistance between data circuit and ground/battery should not be low
- Signal integrity: look for clean digital pulses, correct voltage swing, and no excessive noise or missing frames
Diagnostic algorithm
- Verify battery voltage and good engine/chassis grounds. Fix any charging or ground issues first.
- Use a scan tool and confirm P1573 along with any other communication codes. Note whether EBTCM is present/communicating.
- Clear codes and attempt to reproduce. If P1573 returns immediately, proceed to wiring checks.
- Visually inspect connectors and wiring between PCM and EBTCM for damage, corrosion, or water intrusion. Repair damaged wiring/connectors.
- Backprobe the serial data line(s) at the EBTCM and PCM. With a scope (preferred) or logic tool, verify valid data pulses/frames with key ON/crank.
- If no data or noisy signal, isolate by disconnecting aftermarket devices or non-essential modules on the same bus and re-test.
- Check continuity and resistance of the data wiring between PCM and EBTCM; look for opens, shorts to ground/power, or high resistance at connector terminals.
- If a short to ground/power is suspected, remove sections of harness or disconnect modules one at a time to locate the short.
- If wiring and power/grounds are good but communication still fails, swap or bench-test the EBTCM (if available) or replace with a known-good module and verify. Do not replace modules prematurely—confirm fault isolation first.
- After replacement of any module, program/configure per factory procedures and recheck for codes and proper communication.
Likely causes
- Damaged connector at EBTCM or PCM (water/corrosion)
- Open/short in single-wire serial bus or CAN wiring between the two modules
- Faulty EBTCM (common on vehicles with water intrusion in ABS module)
- Poor battery/ground causing module reset and lost communication
Fault status
Similar codes
Brands with available manuals
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P1573
PCM EBTCM Serial Data Circuit
Causes
- Open, short or high resistance in the serial data wiring between PCM and EBTCM
- Corroded / loose connectors or pin damage at PCM, EBTCM or splice points
- Failed PCM or EBTCM
- Blown fuse or poor battery/ground connections causing voltage irregularities
- Aftermarket electronics or modules loading/shorting the data bus
- Intermittent wiring damage (rubbed through, water intrusion, rodent damage)
Symptoms
- Malfunction Indicator Lamp (MIL) or ABS/Traction control warning lights
- Loss of traction control / stability control functions
- Intermittent or permanent loss of communication with EBTCM on scan tool
- Related drivability or braking system warnings
- Possible limp-in behavior if other modules lose PCM data
What to check
- Connect a capable scan tool; read all stored U/P codes and module presence/status
- Check battery voltage and main grounds; verify stable voltage (12.4–14.6 V with engine running)
- Inspect EBTCM and PCM connectors for corrosion, bent pins, water, or damage
- Check fuses and power feeds for PCM/EBTCM
- Wiggle/operate harness while watching live data or communication status for intermittent faults
- Use backprobe or scope to verify serial data activity on the bus at PCM and EBTCM
Signal parameters
- Vehicle may use GM Class 2 single-wire serial data or GMLAN/CAN — consult model-specific wiring manual
- Class 2: single-wire asynchronous pulses; expect periodic traffic when key ON/crank (no steady DC level)
- CAN (if used): differential idle ~2.5 V (both lines); active frames show opposing voltages — verify with scope
- No continuous short to battery or ground on the data line(s); resistance between data circuit and ground/battery should not be low
- Signal integrity: look for clean digital pulses, correct voltage swing, and no excessive noise or missing frames
Diagnostic algorithm
- Verify battery voltage and good engine/chassis grounds. Fix any charging or ground issues first.
- Use a scan tool and confirm P1573 along with any other communication codes. Note whether EBTCM is present/communicating.
- Clear codes and attempt to reproduce. If P1573 returns immediately, proceed to wiring checks.
- Visually inspect connectors and wiring between PCM and EBTCM for damage, corrosion, or water intrusion. Repair damaged wiring/connectors.
- Backprobe the serial data line(s) at the EBTCM and PCM. With a scope (preferred) or logic tool, verify valid data pulses/frames with key ON/crank.
- If no data or noisy signal, isolate by disconnecting aftermarket devices or non-essential modules on the same bus and re-test.
- Check continuity and resistance of the data wiring between PCM and EBTCM; look for opens, shorts to ground/power, or high resistance at connector terminals.
- If a short to ground/power is suspected, remove sections of harness or disconnect modules one at a time to locate the short.
- If wiring and power/grounds are good but communication still fails, swap or bench-test the EBTCM (if available) or replace with a known-good module and verify. Do not replace modules prematurely—confirm fault isolation first.
- After replacement of any module, program/configure per factory procedures and recheck for codes and proper communication.
Likely causes
- Damaged connector at EBTCM or PCM (water/corrosion)
- Open/short in single-wire serial bus or CAN wiring between the two modules
- Faulty EBTCM (common on vehicles with water intrusion in ABS module)
- Poor battery/ground causing module reset and lost communication
Fault status
Similar codes
P1573
Left Engine Mount Solenoid Valve Open Circuit
Causes
- Open, short or high resistance in the serial data wiring between PCM and EBTCM
- Corroded / loose connectors or pin damage at PCM, EBTCM or splice points
- Failed PCM or EBTCM
- Blown fuse or poor battery/ground connections causing voltage irregularities
- Aftermarket electronics or modules loading/shorting the data bus
- Intermittent wiring damage (rubbed through, water intrusion, rodent damage)
Symptoms
- Malfunction Indicator Lamp (MIL) or ABS/Traction control warning lights
- Loss of traction control / stability control functions
- Intermittent or permanent loss of communication with EBTCM on scan tool
- Related drivability or braking system warnings
- Possible limp-in behavior if other modules lose PCM data
What to check
- Connect a capable scan tool; read all stored U/P codes and module presence/status
- Check battery voltage and main grounds; verify stable voltage (12.4–14.6 V with engine running)
- Inspect EBTCM and PCM connectors for corrosion, bent pins, water, or damage
- Check fuses and power feeds for PCM/EBTCM
- Wiggle/operate harness while watching live data or communication status for intermittent faults
- Use backprobe or scope to verify serial data activity on the bus at PCM and EBTCM
Signal parameters
- Vehicle may use GM Class 2 single-wire serial data or GMLAN/CAN — consult model-specific wiring manual
- Class 2: single-wire asynchronous pulses; expect periodic traffic when key ON/crank (no steady DC level)
- CAN (if used): differential idle ~2.5 V (both lines); active frames show opposing voltages — verify with scope
- No continuous short to battery or ground on the data line(s); resistance between data circuit and ground/battery should not be low
- Signal integrity: look for clean digital pulses, correct voltage swing, and no excessive noise or missing frames
Diagnostic algorithm
- Verify battery voltage and good engine/chassis grounds. Fix any charging or ground issues first.
- Use a scan tool and confirm P1573 along with any other communication codes. Note whether EBTCM is present/communicating.
- Clear codes and attempt to reproduce. If P1573 returns immediately, proceed to wiring checks.
- Visually inspect connectors and wiring between PCM and EBTCM for damage, corrosion, or water intrusion. Repair damaged wiring/connectors.
- Backprobe the serial data line(s) at the EBTCM and PCM. With a scope (preferred) or logic tool, verify valid data pulses/frames with key ON/crank.
- If no data or noisy signal, isolate by disconnecting aftermarket devices or non-essential modules on the same bus and re-test.
- Check continuity and resistance of the data wiring between PCM and EBTCM; look for opens, shorts to ground/power, or high resistance at connector terminals.
- If a short to ground/power is suspected, remove sections of harness or disconnect modules one at a time to locate the short.
- If wiring and power/grounds are good but communication still fails, swap or bench-test the EBTCM (if available) or replace with a known-good module and verify. Do not replace modules prematurely—confirm fault isolation first.
- After replacement of any module, program/configure per factory procedures and recheck for codes and proper communication.
Likely causes
- Damaged connector at EBTCM or PCM (water/corrosion)
- Open/short in single-wire serial bus or CAN wiring between the two modules
- Faulty EBTCM (common on vehicles with water intrusion in ABS module)
- Poor battery/ground causing module reset and lost communication
Fault status
Similar codes
Manual library for VOLKSWAGEN
Browse 139 VOLKSWAGEN manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
VOLKSWAGEN
-
VOLKSWAGEN: 2021
-
Atlas
- S, AWD
- S, FWD
- SE, 2.0L Eng VIN P, AWD
- SE, 2.0L Eng VIN P, FWD
- SE, 3.6L Eng VIN R, AWD
- SE, 3.6L Eng VIN R, FWD
- SEL, 2.0L Eng VIN P · 2.0L Eng VIN P2021: Atlas SEL
- SEL, 3.6L Eng VIN R, AWD
- SEL, 3.6L Eng VIN R, FWD
- SEL Premium, 2.0L Eng VIN P · 2.0L Eng VIN P2021: Atlas SEL Premium
- SEL Premium, 3.6L Eng VIN R · 3.6L Eng VIN R2021: Atlas SEL Premium
- SEL Premium R-Line
- SEL R-Line, AWD
- SEL R-Line, FWD
- SE R-Line, AWD
- SE R-Line, FWD
-
Atlas Cross Sport
- S, AWD
- S, FWD
- SE, 2.0L Eng VIN C, AWD
- SE, 2.0L Eng VIN C, FWD
- SE, 3.6L Eng VIN E, AWD
- SE, 3.6L Eng VIN E, FWD
- SEL, 2.0L Eng VIN C · 2.0L Eng VIN C2021: Atlas Cross Sport SEL
- SEL, 3.6L Eng VIN E, AWD
- SEL, 3.6L Eng VIN E, FWD
- SEL Premium, 2.0L Eng VIN C · 2.0L Eng VIN C2021: Atlas Cross Sport SEL Premium
- SEL Premium, 3.6L Eng VIN E · 3.6L Eng VIN E2021: Atlas Cross Sport SEL Premium
- SEL Premium R-Line
- SEL R-Line, AWD
- SEL R-Line, FWD
- SE R-Line, AWD
- SE R-Line, FWD
-
VOLKSWAGEN: 2020
-
Atlas
- S, 2.0L Eng VIN P · 2.0L Eng VIN P2020: Atlas S
- S, 3.6L Eng VIN R · 3.6L Eng VIN R2020: Atlas S
- SE, 2.0L Eng VIN P · 2.0L Eng VIN P2020: Atlas SE
- SE, 3.6L Eng VIN R, AWD
- SE, 3.6L Eng VIN R, FWD
- SEL, 2.0L Eng VIN P · 2.0L Eng VIN P2020: Atlas SEL
- SEL, 3.6L Eng VIN R, AWD
- SEL, 3.6L Eng VIN R, FWD
- SEL Premium
- SEL R-Line, AWD
- SEL R-Line, FWD
- SE R-Line, AWD
- SE R-Line, FWD
-
Atlas Cross Sport
- S, AWD
- S, FWD
- SE, 2.0L Eng VIN C, AWD
- SE, 2.0L Eng VIN C, FWD
- SE, 3.6L Eng VIN E, AWD
- SE, 3.6L Eng VIN E, FWD
- SEL, 2.0L Eng VIN C, AWD
- SEL, 2.0L Eng VIN C, FWD
- SEL, 3.6L Eng VIN E, AWD
- SEL, 3.6L Eng VIN E, FWD
- SEL Premium
- SEL Premium R-Line
- SEL R-Line, AWD
- SEL R-Line, FWD
- SE R-Line, AWD
- SE R-Line, FWD
-
Jetta
- GLI Autobahn, Automatic DCT Trans
- GLI Autobahn, Standard Trans
- GLI S, Automatic DCT Trans
- GLI S, Standard Trans
- R-Line, 1.4L Eng VIN 5, Automatic Trans
- R-Line, 1.4L Eng VIN 5, Standard Trans
- R-Line, 1.4L Eng VIN B · 1.4L Eng VIN B2020: Jetta R-Line
- S, 1.4L Eng VIN 5, Automatic Trans
- S, 1.4L Eng VIN 5, Standard Trans
- S, 1.4L Eng VIN B · 1.4L Eng VIN B2020: Jetta S
- SE, 1.4L Eng VIN 5 · 1.4L Eng VIN 52020: Jetta SE
- SE, 1.4L Eng VIN B · 1.4L Eng VIN B2020: Jetta SE
- SEL, 1.4L Eng VIN 5 · 1.4L Eng VIN 52020: Jetta SEL
- SEL, 1.4L Eng VIN B · 1.4L Eng VIN B2020: Jetta SEL
- SEL Premium, 1.4L Eng VIN 5 · 1.4L Eng VIN 52020: Jetta SEL Premium
- SEL Premium, 1.4L Eng VIN B · 1.4L Eng VIN B2020: Jetta SEL Premium
