Code
P0757
Generic
P — Powertrain
Shift Solenoid B Stuck On
Views:
UK: 17
EN: 37
RU: 24
AI status
Completed
Completed
100%
Causes
- Short to battery voltage in solenoid B control circuit
- Failed (electrically stuck) shift solenoid B
- Internal valve body sticking or debris/contamination
- Short to ground in the solenoid circuit
- Open or high-resistance wiring or poor connector/terminal connection
- Faulty TCM/PCM or driver transistor
Symptoms
- Check Engine Light (MIL) illuminated; code P0757 stored
- Harsh, delayed, or erratic shifts especially for the gear controlled by solenoid B
- Transmission stuck in a single gear or fails to shift into certain gears
- Reduced engine performance or limp-in mode
- Uncommanded engagement of the gear controlled by solenoid B
- Transmission fluid contamination or burnt smell (possible)
What to check
- Retrieve freeze frame and scan for other transmission codes (P0700, related solenoid codes)
- Inspect transmission fluid level and condition (color, burnt smell, contaminants)
- Visually inspect wiring harness and connector for corrosion, damage, pin push-out, or melted insulation at solenoid B
- Check for Technical Service Bulletins (TSBs) and software updates for TCM/PCM
- Use a scan tool to monitor/command shift solenoid B (on/off) and watch live data
Signal parameters
- Expected coil resistance: vehicle-specific; typical range ~6–30 Ω (measure with connector unplugged)
- Control voltage OFF: ~0 V; ON: pulsed to battery voltage (≈12 V) via driver
- Controlled by PWM: typical frequency range ≈20–200 Hz (vehicle-specific)
- Duty cycle varies with shift request; ON command will show current draw increase
- Response time: milliseconds to engage (vehicle-specific)
Diagnostic algorithm
- Connect an OBD-II scan tool, read and record DTCs and freeze frame data. Note vehicle operating conditions when code set.
- Inspect transmission fluid level and condition; correct level if low and note contamination. Replace fluid/filter if heavily contaminated before further testing.
- Visually inspect wiring and connector for shift solenoid B for damage, corrosion, or pin issues. Repair any damaged wiring or terminals.
- Back-probe solenoid B connector. With ignition ON (engine off), command solenoid B ON/OFF using scan tool and observe voltage at the harness while commanding. ON should show pulsed/battery voltage; OFF ~0 V.
- Unplug solenoid connector and measure coil resistance with multimeter. Compare to vehicle spec. Infinite/open or short-to-ground/short-to-battery indicates solenoid or wiring fault.
- While commanding solenoid ON, measure current draw (if possible) or use a test light to detect if circuit is being driven. Excessive current suggests short; zero/no current suggests open or driver failure.
- If wiring checks good and solenoid resistance is out of spec or shows short/ground, bench-test or replace solenoid B. If bench testing not possible, replace solenoid/valve body as required.
- If solenoid and wiring test good but driver output is always active, suspect TCM/PCM fault. Verify ground and power at module and check for software updates; repair or replace module as last resort.
- After repairs, clear codes and perform road test with scan tool to confirm proper operation and that P0757 does not recur.
Likely causes
- Damaged wiring/connector (short to 12V) at shift solenoid B
- Faulty shift solenoid B coil internally shorted or welded closed
- Contaminated/dirty transmission fluid or debris in valve body causing valve to stick
- Poor electrical connection at harness pin or ground
- TCM/PCM output driver failure (less common)
Fault status
Status
P0757 - Shift Solenoid B Stuck On: TCM/PCM detects solenoid B circuit continuously energized or equivalent condition; shift control affected.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
Similar codes
Workshop Manuals
Available brands with manuals
2
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Audi A3 (1997) – 1.6L 4-cylinder (2‑valve) Engine Mechanical Components Service Manual (AEH, AKL, APF) – Edition 07.2002
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Audi A4 / A4 Cabriolet – 4.2 l V8 (5‑valve, timing chains) – Workshop Manual (Mechanics) – Edition 04.2007
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Code
P0757
GWM
P — Powertrain
- Damage to B solenoid switch
Views:
UK: 2
EN: 6
RU: 4
AI status
Completed
Completed
100%
Causes
- Short to battery voltage in solenoid B control circuit
- Failed (electrically stuck) shift solenoid B
- Internal valve body sticking or debris/contamination
- Short to ground in the solenoid circuit
- Open or high-resistance wiring or poor connector/terminal connection
- Faulty TCM/PCM or driver transistor
Symptoms
- Check Engine Light (MIL) illuminated; code P0757 stored
- Harsh, delayed, or erratic shifts especially for the gear controlled by solenoid B
- Transmission stuck in a single gear or fails to shift into certain gears
- Reduced engine performance or limp-in mode
- Uncommanded engagement of the gear controlled by solenoid B
- Transmission fluid contamination or burnt smell (possible)
What to check
- Retrieve freeze frame and scan for other transmission codes (P0700, related solenoid codes)
- Inspect transmission fluid level and condition (color, burnt smell, contaminants)
- Visually inspect wiring harness and connector for corrosion, damage, pin push-out, or melted insulation at solenoid B
- Check for Technical Service Bulletins (TSBs) and software updates for TCM/PCM
- Use a scan tool to monitor/command shift solenoid B (on/off) and watch live data
Signal parameters
- Expected coil resistance: vehicle-specific; typical range ~6–30 Ω (measure with connector unplugged)
- Control voltage OFF: ~0 V; ON: pulsed to battery voltage (≈12 V) via driver
- Controlled by PWM: typical frequency range ≈20–200 Hz (vehicle-specific)
- Duty cycle varies with shift request; ON command will show current draw increase
- Response time: milliseconds to engage (vehicle-specific)
Diagnostic algorithm
- Connect an OBD-II scan tool, read and record DTCs and freeze frame data. Note vehicle operating conditions when code set.
- Inspect transmission fluid level and condition; correct level if low and note contamination. Replace fluid/filter if heavily contaminated before further testing.
- Visually inspect wiring and connector for shift solenoid B for damage, corrosion, or pin issues. Repair any damaged wiring or terminals.
- Back-probe solenoid B connector. With ignition ON (engine off), command solenoid B ON/OFF using scan tool and observe voltage at the harness while commanding. ON should show pulsed/battery voltage; OFF ~0 V.
- Unplug solenoid connector and measure coil resistance with multimeter. Compare to vehicle spec. Infinite/open or short-to-ground/short-to-battery indicates solenoid or wiring fault.
- While commanding solenoid ON, measure current draw (if possible) or use a test light to detect if circuit is being driven. Excessive current suggests short; zero/no current suggests open or driver failure.
- If wiring checks good and solenoid resistance is out of spec or shows short/ground, bench-test or replace solenoid B. If bench testing not possible, replace solenoid/valve body as required.
- If solenoid and wiring test good but driver output is always active, suspect TCM/PCM fault. Verify ground and power at module and check for software updates; repair or replace module as last resort.
- After repairs, clear codes and perform road test with scan tool to confirm proper operation and that P0757 does not recur.
Likely causes
- Damaged wiring/connector (short to 12V) at shift solenoid B
- Faulty shift solenoid B coil internally shorted or welded closed
- Contaminated/dirty transmission fluid or debris in valve body causing valve to stick
- Poor electrical connection at harness pin or ground
- TCM/PCM output driver failure (less common)
Fault status
Status
P0757 - Shift Solenoid B Stuck On: TCM/PCM detects solenoid B circuit continuously energized or equivalent condition; shift control affected.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
Similar codes
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Code
P0757
HUMMER
P — Powertrain
2-3 Shift Solenoid Valve Performance - No Third or Fourth Gear
Views:
UK: 9
EN: 24
RU: 12
AI status
Completed
Completed
100%
Causes
- Short to battery voltage in solenoid B control circuit
- Failed (electrically stuck) shift solenoid B
- Internal valve body sticking or debris/contamination
- Short to ground in the solenoid circuit
- Open or high-resistance wiring or poor connector/terminal connection
- Faulty TCM/PCM or driver transistor
Symptoms
- Check Engine Light (MIL) illuminated; code P0757 stored
- Harsh, delayed, or erratic shifts especially for the gear controlled by solenoid B
- Transmission stuck in a single gear or fails to shift into certain gears
- Reduced engine performance or limp-in mode
- Uncommanded engagement of the gear controlled by solenoid B
- Transmission fluid contamination or burnt smell (possible)
What to check
- Retrieve freeze frame and scan for other transmission codes (P0700, related solenoid codes)
- Inspect transmission fluid level and condition (color, burnt smell, contaminants)
- Visually inspect wiring harness and connector for corrosion, damage, pin push-out, or melted insulation at solenoid B
- Check for Technical Service Bulletins (TSBs) and software updates for TCM/PCM
- Use a scan tool to monitor/command shift solenoid B (on/off) and watch live data
Signal parameters
- Expected coil resistance: vehicle-specific; typical range ~6–30 Ω (measure with connector unplugged)
- Control voltage OFF: ~0 V; ON: pulsed to battery voltage (≈12 V) via driver
- Controlled by PWM: typical frequency range ≈20–200 Hz (vehicle-specific)
- Duty cycle varies with shift request; ON command will show current draw increase
- Response time: milliseconds to engage (vehicle-specific)
Diagnostic algorithm
- Connect an OBD-II scan tool, read and record DTCs and freeze frame data. Note vehicle operating conditions when code set.
- Inspect transmission fluid level and condition; correct level if low and note contamination. Replace fluid/filter if heavily contaminated before further testing.
- Visually inspect wiring and connector for shift solenoid B for damage, corrosion, or pin issues. Repair any damaged wiring or terminals.
- Back-probe solenoid B connector. With ignition ON (engine off), command solenoid B ON/OFF using scan tool and observe voltage at the harness while commanding. ON should show pulsed/battery voltage; OFF ~0 V.
- Unplug solenoid connector and measure coil resistance with multimeter. Compare to vehicle spec. Infinite/open or short-to-ground/short-to-battery indicates solenoid or wiring fault.
- While commanding solenoid ON, measure current draw (if possible) or use a test light to detect if circuit is being driven. Excessive current suggests short; zero/no current suggests open or driver failure.
- If wiring checks good and solenoid resistance is out of spec or shows short/ground, bench-test or replace solenoid B. If bench testing not possible, replace solenoid/valve body as required.
- If solenoid and wiring test good but driver output is always active, suspect TCM/PCM fault. Verify ground and power at module and check for software updates; repair or replace module as last resort.
- After repairs, clear codes and perform road test with scan tool to confirm proper operation and that P0757 does not recur.
Likely causes
- Damaged wiring/connector (short to 12V) at shift solenoid B
- Faulty shift solenoid B coil internally shorted or welded closed
- Contaminated/dirty transmission fluid or debris in valve body causing valve to stick
- Poor electrical connection at harness pin or ground
- TCM/PCM output driver failure (less common)
Fault status
Status
P0757 - Shift Solenoid B Stuck On: TCM/PCM detects solenoid B circuit continuously energized or equivalent condition; shift control affected.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
Similar codes
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Code
P0757
MERCEDES-BENZ
P — Powertrain
Shift Solenoid B Stuck On
Views:
UK: 11
EN: 27
RU: 19
AI status
Completed
Completed
100%
Causes
- Short to battery voltage in solenoid B control circuit
- Failed (electrically stuck) shift solenoid B
- Internal valve body sticking or debris/contamination
- Short to ground in the solenoid circuit
- Open or high-resistance wiring or poor connector/terminal connection
- Faulty TCM/PCM or driver transistor
Symptoms
- Check Engine Light (MIL) illuminated; code P0757 stored
- Harsh, delayed, or erratic shifts especially for the gear controlled by solenoid B
- Transmission stuck in a single gear or fails to shift into certain gears
- Reduced engine performance or limp-in mode
- Uncommanded engagement of the gear controlled by solenoid B
- Transmission fluid contamination or burnt smell (possible)
What to check
- Retrieve freeze frame and scan for other transmission codes (P0700, related solenoid codes)
- Inspect transmission fluid level and condition (color, burnt smell, contaminants)
- Visually inspect wiring harness and connector for corrosion, damage, pin push-out, or melted insulation at solenoid B
- Check for Technical Service Bulletins (TSBs) and software updates for TCM/PCM
- Use a scan tool to monitor/command shift solenoid B (on/off) and watch live data
Signal parameters
- Expected coil resistance: vehicle-specific; typical range ~6–30 Ω (measure with connector unplugged)
- Control voltage OFF: ~0 V; ON: pulsed to battery voltage (≈12 V) via driver
- Controlled by PWM: typical frequency range ≈20–200 Hz (vehicle-specific)
- Duty cycle varies with shift request; ON command will show current draw increase
- Response time: milliseconds to engage (vehicle-specific)
Diagnostic algorithm
- Connect an OBD-II scan tool, read and record DTCs and freeze frame data. Note vehicle operating conditions when code set.
- Inspect transmission fluid level and condition; correct level if low and note contamination. Replace fluid/filter if heavily contaminated before further testing.
- Visually inspect wiring and connector for shift solenoid B for damage, corrosion, or pin issues. Repair any damaged wiring or terminals.
- Back-probe solenoid B connector. With ignition ON (engine off), command solenoid B ON/OFF using scan tool and observe voltage at the harness while commanding. ON should show pulsed/battery voltage; OFF ~0 V.
- Unplug solenoid connector and measure coil resistance with multimeter. Compare to vehicle spec. Infinite/open or short-to-ground/short-to-battery indicates solenoid or wiring fault.
- While commanding solenoid ON, measure current draw (if possible) or use a test light to detect if circuit is being driven. Excessive current suggests short; zero/no current suggests open or driver failure.
- If wiring checks good and solenoid resistance is out of spec or shows short/ground, bench-test or replace solenoid B. If bench testing not possible, replace solenoid/valve body as required.
- If solenoid and wiring test good but driver output is always active, suspect TCM/PCM fault. Verify ground and power at module and check for software updates; repair or replace module as last resort.
- After repairs, clear codes and perform road test with scan tool to confirm proper operation and that P0757 does not recur.
Likely causes
- Damaged wiring/connector (short to 12V) at shift solenoid B
- Faulty shift solenoid B coil internally shorted or welded closed
- Contaminated/dirty transmission fluid or debris in valve body causing valve to stick
- Poor electrical connection at harness pin or ground
- TCM/PCM output driver failure (less common)
Fault status
Status
P0757 - Shift Solenoid B Stuck On: TCM/PCM detects solenoid B circuit continuously energized or equivalent condition; shift control affected.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
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HTML ManualYour experience will help others
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