Code
P0759
Generic
P — Powertrain
Shift Solenoid B Intermittent
Views:
UK: 14
EN: 22
RU: 26
AI status
Completed
Completed
100%
Causes
- Intermittent open or short in shift solenoid B wiring or connector
- Corroded, loose, or damaged connector pins
- Faulty shift solenoid B (coil intermittent)
- Contaminated or degraded transmission fluid causing solenoid sticking
- Faulty valve body or internal hydraulic issue affecting solenoid operation
- Intermittent output driver fault in the TCM/PCM
Symptoms
- Check Engine Light or Transmission warning lamp illuminated
- Intermittent harsh, delayed, or erratic shifting
- Vehicle may slip or fail to shift into certain gears intermittently
- Limp-home mode or reduced transmission function at times
- No consistent drivability problem when solenoid is functioning
What to check
- Retrieve freeze frame and live data from scan tool; attempt to reproduce while monitoring shift solenoid B status
- Inspect transmission fluid level and condition (color, smell, particulates)
- Visually inspect wiring harness and connectors at the transmission and along the circuit for damage or corrosion
- Wiggle-test wiring and connector while monitoring live data for intermittent changes
- Measure resistance of solenoid coil (at the solenoid connector) with ignition off
- Back-probe connector and check for proper supply voltage and ground with ignition on and during shifting
Signal parameters
- Control signal: PCM/TCM typically grounds or PWM-controls solenoid; expect switching between near-battery voltage and ground when actuated
- Supply voltage at connector (key ON): approximately battery voltage (~12V) on the feed side
- Coil resistance (typical range): often roughly 10–40 ohms (varies by model) — compare to factory spec
- PWM frequency and duty: many systems use low-to-moderate PWM (tens to a few hundred Hz) and varying duty cycle to control apply pressure
- Intermittent fault: signal may show unstable switching, open circuit, or sudden loss of ground/supply
Diagnostic algorithm
- Read and record freeze frame, pending and stored codes. Note conditions when code set.
- Road test or dyno test to try to reproduce the intermittent fault while monitoring live data for shift solenoid B activity and transmission variables.
- Visually inspect transmission fluid level/condition; if fluid is very dirty or burnt, consider fluid/filter service before further testing.
- Inspect connector and wiring for corrosion, damaged insulation, pin damage, or water intrusion. Repair any obvious damage.
- With ignition off, measure solenoid coil resistance at the transmission connector and compare to factory spec; wiggle harness to check for intermittent change.
- Back-probe harness with ignition on and while commanding solenoid ON/OFF from a scan tool. Verify supply voltage, ground switching (or PWM), and look for intermittent loss.
- Check continuity between solenoid connector and PCM/TCM connector; inspect grounds for resistance and security.
- If wiring and connectors are good, bench-test or swap solenoid with an identical known-good solenoid (if accessible) to confirm solenoid integrity.
- If solenoid replacement fixes the issue, clear codes and retest to verify permanent repair. If intermittent continues and wiring is confirmed good, consider TCM/PCM driver fault and follow manufacturer guidance for module testing/replacement.
- If internal valve body contamination or mechanical sticking is suspected, consider transmission service (filter, fluid) and valve body inspection/repair.
Likely causes
- Wiring/connector corrosion at transmission harness
- Worn or failing solenoid coil with intermittent internal break
- Debris in valve body causing intermittent hydraulic flow
- Intermittent control driver inside TCM/PCM (less common)
- Low or dirty transmission fluid causing solenoid sticking
Fault status
Status
P0759 — Shift Solenoid B Intermittent: TCM detected intermittent/open/erratic behavior in the Shift Solenoid B control circuit.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
Similar codes
Workshop Manuals
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LAND ROVER 1
Land Rover Defender Workshop Manual 1999-2002 MY
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Code
P0759
GWM
P — Powertrain
- Malfunction of solenoid switch B
Views:
UK: 0
EN: 3
RU: 7
AI status
Completed
Completed
100%
Causes
- Intermittent open or short in shift solenoid B wiring or connector
- Corroded, loose, or damaged connector pins
- Faulty shift solenoid B (coil intermittent)
- Contaminated or degraded transmission fluid causing solenoid sticking
- Faulty valve body or internal hydraulic issue affecting solenoid operation
- Intermittent output driver fault in the TCM/PCM
Symptoms
- Check Engine Light or Transmission warning lamp illuminated
- Intermittent harsh, delayed, or erratic shifting
- Vehicle may slip or fail to shift into certain gears intermittently
- Limp-home mode or reduced transmission function at times
- No consistent drivability problem when solenoid is functioning
What to check
- Retrieve freeze frame and live data from scan tool; attempt to reproduce while monitoring shift solenoid B status
- Inspect transmission fluid level and condition (color, smell, particulates)
- Visually inspect wiring harness and connectors at the transmission and along the circuit for damage or corrosion
- Wiggle-test wiring and connector while monitoring live data for intermittent changes
- Measure resistance of solenoid coil (at the solenoid connector) with ignition off
- Back-probe connector and check for proper supply voltage and ground with ignition on and during shifting
Signal parameters
- Control signal: PCM/TCM typically grounds or PWM-controls solenoid; expect switching between near-battery voltage and ground when actuated
- Supply voltage at connector (key ON): approximately battery voltage (~12V) on the feed side
- Coil resistance (typical range): often roughly 10–40 ohms (varies by model) — compare to factory spec
- PWM frequency and duty: many systems use low-to-moderate PWM (tens to a few hundred Hz) and varying duty cycle to control apply pressure
- Intermittent fault: signal may show unstable switching, open circuit, or sudden loss of ground/supply
Diagnostic algorithm
- Read and record freeze frame, pending and stored codes. Note conditions when code set.
- Road test or dyno test to try to reproduce the intermittent fault while monitoring live data for shift solenoid B activity and transmission variables.
- Visually inspect transmission fluid level/condition; if fluid is very dirty or burnt, consider fluid/filter service before further testing.
- Inspect connector and wiring for corrosion, damaged insulation, pin damage, or water intrusion. Repair any obvious damage.
- With ignition off, measure solenoid coil resistance at the transmission connector and compare to factory spec; wiggle harness to check for intermittent change.
- Back-probe harness with ignition on and while commanding solenoid ON/OFF from a scan tool. Verify supply voltage, ground switching (or PWM), and look for intermittent loss.
- Check continuity between solenoid connector and PCM/TCM connector; inspect grounds for resistance and security.
- If wiring and connectors are good, bench-test or swap solenoid with an identical known-good solenoid (if accessible) to confirm solenoid integrity.
- If solenoid replacement fixes the issue, clear codes and retest to verify permanent repair. If intermittent continues and wiring is confirmed good, consider TCM/PCM driver fault and follow manufacturer guidance for module testing/replacement.
- If internal valve body contamination or mechanical sticking is suspected, consider transmission service (filter, fluid) and valve body inspection/repair.
Likely causes
- Wiring/connector corrosion at transmission harness
- Worn or failing solenoid coil with intermittent internal break
- Debris in valve body causing intermittent hydraulic flow
- Intermittent control driver inside TCM/PCM (less common)
- Low or dirty transmission fluid causing solenoid sticking
Fault status
Status
P0759 — Shift Solenoid B Intermittent: TCM detected intermittent/open/erratic behavior in the Shift Solenoid B control circuit.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
P0759
HUMMER
P — Powertrain
Shift Solenoid B Intermittent
Views:
UK: 10
EN: 16
RU: 22
AI status
Completed
Completed
100%
Causes
- Intermittent open or short in shift solenoid B wiring or connector
- Corroded, loose, or damaged connector pins
- Faulty shift solenoid B (coil intermittent)
- Contaminated or degraded transmission fluid causing solenoid sticking
- Faulty valve body or internal hydraulic issue affecting solenoid operation
- Intermittent output driver fault in the TCM/PCM
Symptoms
- Check Engine Light or Transmission warning lamp illuminated
- Intermittent harsh, delayed, or erratic shifting
- Vehicle may slip or fail to shift into certain gears intermittently
- Limp-home mode or reduced transmission function at times
- No consistent drivability problem when solenoid is functioning
What to check
- Retrieve freeze frame and live data from scan tool; attempt to reproduce while monitoring shift solenoid B status
- Inspect transmission fluid level and condition (color, smell, particulates)
- Visually inspect wiring harness and connectors at the transmission and along the circuit for damage or corrosion
- Wiggle-test wiring and connector while monitoring live data for intermittent changes
- Measure resistance of solenoid coil (at the solenoid connector) with ignition off
- Back-probe connector and check for proper supply voltage and ground with ignition on and during shifting
Signal parameters
- Control signal: PCM/TCM typically grounds or PWM-controls solenoid; expect switching between near-battery voltage and ground when actuated
- Supply voltage at connector (key ON): approximately battery voltage (~12V) on the feed side
- Coil resistance (typical range): often roughly 10–40 ohms (varies by model) — compare to factory spec
- PWM frequency and duty: many systems use low-to-moderate PWM (tens to a few hundred Hz) and varying duty cycle to control apply pressure
- Intermittent fault: signal may show unstable switching, open circuit, or sudden loss of ground/supply
Diagnostic algorithm
- Read and record freeze frame, pending and stored codes. Note conditions when code set.
- Road test or dyno test to try to reproduce the intermittent fault while monitoring live data for shift solenoid B activity and transmission variables.
- Visually inspect transmission fluid level/condition; if fluid is very dirty or burnt, consider fluid/filter service before further testing.
- Inspect connector and wiring for corrosion, damaged insulation, pin damage, or water intrusion. Repair any obvious damage.
- With ignition off, measure solenoid coil resistance at the transmission connector and compare to factory spec; wiggle harness to check for intermittent change.
- Back-probe harness with ignition on and while commanding solenoid ON/OFF from a scan tool. Verify supply voltage, ground switching (or PWM), and look for intermittent loss.
- Check continuity between solenoid connector and PCM/TCM connector; inspect grounds for resistance and security.
- If wiring and connectors are good, bench-test or swap solenoid with an identical known-good solenoid (if accessible) to confirm solenoid integrity.
- If solenoid replacement fixes the issue, clear codes and retest to verify permanent repair. If intermittent continues and wiring is confirmed good, consider TCM/PCM driver fault and follow manufacturer guidance for module testing/replacement.
- If internal valve body contamination or mechanical sticking is suspected, consider transmission service (filter, fluid) and valve body inspection/repair.
Likely causes
- Wiring/connector corrosion at transmission harness
- Worn or failing solenoid coil with intermittent internal break
- Debris in valve body causing intermittent hydraulic flow
- Intermittent control driver inside TCM/PCM (less common)
- Low or dirty transmission fluid causing solenoid sticking
Fault status
Status
P0759 — Shift Solenoid B Intermittent: TCM detected intermittent/open/erratic behavior in the Shift Solenoid B control circuit.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
Similar codes
Your experience will help others
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Code
P0759
MERCEDES-BENZ
P — Powertrain
Shift Solenoid B Intermittent
Views:
UK: 12
EN: 11
RU: 24
AI status
Completed
Completed
100%
Causes
- Intermittent open or short in shift solenoid B wiring or connector
- Corroded, loose, or damaged connector pins
- Faulty shift solenoid B (coil intermittent)
- Contaminated or degraded transmission fluid causing solenoid sticking
- Faulty valve body or internal hydraulic issue affecting solenoid operation
- Intermittent output driver fault in the TCM/PCM
Symptoms
- Check Engine Light or Transmission warning lamp illuminated
- Intermittent harsh, delayed, or erratic shifting
- Vehicle may slip or fail to shift into certain gears intermittently
- Limp-home mode or reduced transmission function at times
- No consistent drivability problem when solenoid is functioning
What to check
- Retrieve freeze frame and live data from scan tool; attempt to reproduce while monitoring shift solenoid B status
- Inspect transmission fluid level and condition (color, smell, particulates)
- Visually inspect wiring harness and connectors at the transmission and along the circuit for damage or corrosion
- Wiggle-test wiring and connector while monitoring live data for intermittent changes
- Measure resistance of solenoid coil (at the solenoid connector) with ignition off
- Back-probe connector and check for proper supply voltage and ground with ignition on and during shifting
Signal parameters
- Control signal: PCM/TCM typically grounds or PWM-controls solenoid; expect switching between near-battery voltage and ground when actuated
- Supply voltage at connector (key ON): approximately battery voltage (~12V) on the feed side
- Coil resistance (typical range): often roughly 10–40 ohms (varies by model) — compare to factory spec
- PWM frequency and duty: many systems use low-to-moderate PWM (tens to a few hundred Hz) and varying duty cycle to control apply pressure
- Intermittent fault: signal may show unstable switching, open circuit, or sudden loss of ground/supply
Diagnostic algorithm
- Read and record freeze frame, pending and stored codes. Note conditions when code set.
- Road test or dyno test to try to reproduce the intermittent fault while monitoring live data for shift solenoid B activity and transmission variables.
- Visually inspect transmission fluid level/condition; if fluid is very dirty or burnt, consider fluid/filter service before further testing.
- Inspect connector and wiring for corrosion, damaged insulation, pin damage, or water intrusion. Repair any obvious damage.
- With ignition off, measure solenoid coil resistance at the transmission connector and compare to factory spec; wiggle harness to check for intermittent change.
- Back-probe harness with ignition on and while commanding solenoid ON/OFF from a scan tool. Verify supply voltage, ground switching (or PWM), and look for intermittent loss.
- Check continuity between solenoid connector and PCM/TCM connector; inspect grounds for resistance and security.
- If wiring and connectors are good, bench-test or swap solenoid with an identical known-good solenoid (if accessible) to confirm solenoid integrity.
- If solenoid replacement fixes the issue, clear codes and retest to verify permanent repair. If intermittent continues and wiring is confirmed good, consider TCM/PCM driver fault and follow manufacturer guidance for module testing/replacement.
- If internal valve body contamination or mechanical sticking is suspected, consider transmission service (filter, fluid) and valve body inspection/repair.
Likely causes
- Wiring/connector corrosion at transmission harness
- Worn or failing solenoid coil with intermittent internal break
- Debris in valve body causing intermittent hydraulic flow
- Intermittent control driver inside TCM/PCM (less common)
- Low or dirty transmission fluid causing solenoid sticking
Fault status
Status
P0759 — Shift Solenoid B Intermittent: TCM detected intermittent/open/erratic behavior in the Shift Solenoid B control circuit.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
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0
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