Code
P0771
Generic
P — Powertrain
Shift Solenoid E Performance/Stuck Off
Views:
UK: 22
EN: 48
RU: 37
AI status
Completed
Completed
100%
Causes
- Faulty shift solenoid E (mechanically stuck or electrical failure)
- Open or shorted wiring to solenoid E (connector, harness damage, corrosion)
- Poor electrical connection (loose connector, corroded pins, poor ground)
- Low, dirty, or contaminated transmission fluid
- Faulty TCM/PCM driver circuit
- Internal transmission valve body or hydraulic fault
Symptoms
- Check Engine / Transmission warning light illuminated
- Gear shifting problems (harsh shifts, delayed shifts, or inability to shift into certain gears)
- Transmission may default to limp/limp‑in mode
- Reduced drivability or poor acceleration
- Transmission may stay in a single gear or not engage a gear
- Possible whining or unusual transmission noises if hydraulic internal issue
What to check
- Read freeze frame and live data with a scan tool; observe solenoid E commanded status and actual response
- Scan for related transmission or electrical codes
- Visual inspection of transmission fluid level and condition (color, smell, debris)
- Inspect connector and wiring for corrosion, looseness, damage or pin push‑outs
- Backprobe connector and check for proper battery voltage and ground while commanding the solenoid on/off
- Measure solenoid coil resistance and compare to manufacturer spec
Signal parameters
- Typical coil resistance (varies by vehicle): commonly ~6–30 ohms (consult spec for exact value)
- Control signal: PWM from TCM; duty cycle varies when commanded — voltage swings between ~0–12 V
- When commanded ON: driver should provide ground (or power) and coil should draw current (0.5–2 A typical depending on coil resistance)
- Open circuit: infinite/very high resistance; short to ground or battery: near 0 ohms or blown fuse
- Expect a change in measured circuit voltage or current when solenoid is switched on vs off
Diagnostic algorithm
- Retrieve all stored codes and freeze frame data. Note conditions under which the code set (engine speed, temp, gear, vehicle speed).
- Perform a quick road test or actuate solenoid using a scan tool while monitoring live data; verify whether TCM is commanding solenoid E and if the actual state changes.
- Check transmission fluid level and condition. If fluid is low or contaminated, correct and retest.
- Visually inspect the solenoid connector and wiring harness for damage, corrosion, chafing, or water intrusion. Repair any obvious damage.
- With ignition off, disconnect the solenoid connector and measure coil resistance across the solenoid terminals. Compare to spec. Replace solenoid if out of range or open/shorted.
- Backprobe the harness connector with ignition on (engine off) and verify reference voltage/power and ground presence. Command solenoid on/off and observe voltage/current change. Look for PWM signal when commanded.
- Perform voltage drop tests on the power feed and ground circuits while energizing the solenoid to detect poor connections.
- If wiring and solenoid test good, consider swapping with a known-good identical solenoid (if available) or bench-testing the valve body solenoids.
- If wiring and solenoid are good but no proper driver signal from TCM, inspect for TCM faults, and consider module testing or replacement as a last step.
- After repair, clear codes and perform a verification road test and recheck for recurrence.
Likely causes
- Failed or stuck shift solenoid E
- Open or high resistance in solenoid circuit (broken wire, connector issue)
- Contaminated transmission fluid causing solenoid sticking
- Faulty ground or power feed to the solenoid
- Defective TCM driver (less common)
Fault status
Status
Shift Solenoid E Performance — solenoid did not respond or is stuck off when commanded. Check solenoid, wiring, fluid, and TCM control.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
P0771
GWM
P — Powertrain
- The E solenoid switch
Views:
UK: 1
EN: 4
RU: 2
AI status
Completed
Completed
100%
Causes
- Faulty shift solenoid E (mechanically stuck or electrical failure)
- Open or shorted wiring to solenoid E (connector, harness damage, corrosion)
- Poor electrical connection (loose connector, corroded pins, poor ground)
- Low, dirty, or contaminated transmission fluid
- Faulty TCM/PCM driver circuit
- Internal transmission valve body or hydraulic fault
Symptoms
- Check Engine / Transmission warning light illuminated
- Gear shifting problems (harsh shifts, delayed shifts, or inability to shift into certain gears)
- Transmission may default to limp/limp‑in mode
- Reduced drivability or poor acceleration
- Transmission may stay in a single gear or not engage a gear
- Possible whining or unusual transmission noises if hydraulic internal issue
What to check
- Read freeze frame and live data with a scan tool; observe solenoid E commanded status and actual response
- Scan for related transmission or electrical codes
- Visual inspection of transmission fluid level and condition (color, smell, debris)
- Inspect connector and wiring for corrosion, looseness, damage or pin push‑outs
- Backprobe connector and check for proper battery voltage and ground while commanding the solenoid on/off
- Measure solenoid coil resistance and compare to manufacturer spec
Signal parameters
- Typical coil resistance (varies by vehicle): commonly ~6–30 ohms (consult spec for exact value)
- Control signal: PWM from TCM; duty cycle varies when commanded — voltage swings between ~0–12 V
- When commanded ON: driver should provide ground (or power) and coil should draw current (0.5–2 A typical depending on coil resistance)
- Open circuit: infinite/very high resistance; short to ground or battery: near 0 ohms or blown fuse
- Expect a change in measured circuit voltage or current when solenoid is switched on vs off
Diagnostic algorithm
- Retrieve all stored codes and freeze frame data. Note conditions under which the code set (engine speed, temp, gear, vehicle speed).
- Perform a quick road test or actuate solenoid using a scan tool while monitoring live data; verify whether TCM is commanding solenoid E and if the actual state changes.
- Check transmission fluid level and condition. If fluid is low or contaminated, correct and retest.
- Visually inspect the solenoid connector and wiring harness for damage, corrosion, chafing, or water intrusion. Repair any obvious damage.
- With ignition off, disconnect the solenoid connector and measure coil resistance across the solenoid terminals. Compare to spec. Replace solenoid if out of range or open/shorted.
- Backprobe the harness connector with ignition on (engine off) and verify reference voltage/power and ground presence. Command solenoid on/off and observe voltage/current change. Look for PWM signal when commanded.
- Perform voltage drop tests on the power feed and ground circuits while energizing the solenoid to detect poor connections.
- If wiring and solenoid test good, consider swapping with a known-good identical solenoid (if available) or bench-testing the valve body solenoids.
- If wiring and solenoid are good but no proper driver signal from TCM, inspect for TCM faults, and consider module testing or replacement as a last step.
- After repair, clear codes and perform a verification road test and recheck for recurrence.
Likely causes
- Failed or stuck shift solenoid E
- Open or high resistance in solenoid circuit (broken wire, connector issue)
- Contaminated transmission fluid causing solenoid sticking
- Faulty ground or power feed to the solenoid
- Defective TCM driver (less common)
Fault status
Status
Shift Solenoid E Performance — solenoid did not respond or is stuck off when commanded. Check solenoid, wiring, fluid, and TCM control.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
P0771
HUMMER
P — Powertrain
Shift Solenoid E Performance or Stuck Off
Views:
UK: 13
EN: 12
RU: 15
AI status
Completed
Completed
100%
Causes
- Faulty shift solenoid E (mechanically stuck or electrical failure)
- Open or shorted wiring to solenoid E (connector, harness damage, corrosion)
- Poor electrical connection (loose connector, corroded pins, poor ground)
- Low, dirty, or contaminated transmission fluid
- Faulty TCM/PCM driver circuit
- Internal transmission valve body or hydraulic fault
Symptoms
- Check Engine / Transmission warning light illuminated
- Gear shifting problems (harsh shifts, delayed shifts, or inability to shift into certain gears)
- Transmission may default to limp/limp‑in mode
- Reduced drivability or poor acceleration
- Transmission may stay in a single gear or not engage a gear
- Possible whining or unusual transmission noises if hydraulic internal issue
What to check
- Read freeze frame and live data with a scan tool; observe solenoid E commanded status and actual response
- Scan for related transmission or electrical codes
- Visual inspection of transmission fluid level and condition (color, smell, debris)
- Inspect connector and wiring for corrosion, looseness, damage or pin push‑outs
- Backprobe connector and check for proper battery voltage and ground while commanding the solenoid on/off
- Measure solenoid coil resistance and compare to manufacturer spec
Signal parameters
- Typical coil resistance (varies by vehicle): commonly ~6–30 ohms (consult spec for exact value)
- Control signal: PWM from TCM; duty cycle varies when commanded — voltage swings between ~0–12 V
- When commanded ON: driver should provide ground (or power) and coil should draw current (0.5–2 A typical depending on coil resistance)
- Open circuit: infinite/very high resistance; short to ground or battery: near 0 ohms or blown fuse
- Expect a change in measured circuit voltage or current when solenoid is switched on vs off
Diagnostic algorithm
- Retrieve all stored codes and freeze frame data. Note conditions under which the code set (engine speed, temp, gear, vehicle speed).
- Perform a quick road test or actuate solenoid using a scan tool while monitoring live data; verify whether TCM is commanding solenoid E and if the actual state changes.
- Check transmission fluid level and condition. If fluid is low or contaminated, correct and retest.
- Visually inspect the solenoid connector and wiring harness for damage, corrosion, chafing, or water intrusion. Repair any obvious damage.
- With ignition off, disconnect the solenoid connector and measure coil resistance across the solenoid terminals. Compare to spec. Replace solenoid if out of range or open/shorted.
- Backprobe the harness connector with ignition on (engine off) and verify reference voltage/power and ground presence. Command solenoid on/off and observe voltage/current change. Look for PWM signal when commanded.
- Perform voltage drop tests on the power feed and ground circuits while energizing the solenoid to detect poor connections.
- If wiring and solenoid test good, consider swapping with a known-good identical solenoid (if available) or bench-testing the valve body solenoids.
- If wiring and solenoid are good but no proper driver signal from TCM, inspect for TCM faults, and consider module testing or replacement as a last step.
- After repair, clear codes and perform a verification road test and recheck for recurrence.
Likely causes
- Failed or stuck shift solenoid E
- Open or high resistance in solenoid circuit (broken wire, connector issue)
- Contaminated transmission fluid causing solenoid sticking
- Faulty ground or power feed to the solenoid
- Defective TCM driver (less common)
Fault status
Status
Shift Solenoid E Performance — solenoid did not respond or is stuck off when commanded. Check solenoid, wiring, fluid, and TCM control.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
P0771
LAND ROVER
P — Powertrain
Shift Solenoid E Performance / Stuck
Views:
UK: 7
EN: 8
RU: 7
AI status
Completed
Completed
100%
Causes
- Faulty shift solenoid E (mechanically stuck or electrical failure)
- Open or shorted wiring to solenoid E (connector, harness damage, corrosion)
- Poor electrical connection (loose connector, corroded pins, poor ground)
- Low, dirty, or contaminated transmission fluid
- Faulty TCM/PCM driver circuit
- Internal transmission valve body or hydraulic fault
Symptoms
- Check Engine / Transmission warning light illuminated
- Gear shifting problems (harsh shifts, delayed shifts, or inability to shift into certain gears)
- Transmission may default to limp/limp‑in mode
- Reduced drivability or poor acceleration
- Transmission may stay in a single gear or not engage a gear
- Possible whining or unusual transmission noises if hydraulic internal issue
What to check
- Read freeze frame and live data with a scan tool; observe solenoid E commanded status and actual response
- Scan for related transmission or electrical codes
- Visual inspection of transmission fluid level and condition (color, smell, debris)
- Inspect connector and wiring for corrosion, looseness, damage or pin push‑outs
- Backprobe connector and check for proper battery voltage and ground while commanding the solenoid on/off
- Measure solenoid coil resistance and compare to manufacturer spec
Signal parameters
- Typical coil resistance (varies by vehicle): commonly ~6–30 ohms (consult spec for exact value)
- Control signal: PWM from TCM; duty cycle varies when commanded — voltage swings between ~0–12 V
- When commanded ON: driver should provide ground (or power) and coil should draw current (0.5–2 A typical depending on coil resistance)
- Open circuit: infinite/very high resistance; short to ground or battery: near 0 ohms or blown fuse
- Expect a change in measured circuit voltage or current when solenoid is switched on vs off
Diagnostic algorithm
- Retrieve all stored codes and freeze frame data. Note conditions under which the code set (engine speed, temp, gear, vehicle speed).
- Perform a quick road test or actuate solenoid using a scan tool while monitoring live data; verify whether TCM is commanding solenoid E and if the actual state changes.
- Check transmission fluid level and condition. If fluid is low or contaminated, correct and retest.
- Visually inspect the solenoid connector and wiring harness for damage, corrosion, chafing, or water intrusion. Repair any obvious damage.
- With ignition off, disconnect the solenoid connector and measure coil resistance across the solenoid terminals. Compare to spec. Replace solenoid if out of range or open/shorted.
- Backprobe the harness connector with ignition on (engine off) and verify reference voltage/power and ground presence. Command solenoid on/off and observe voltage/current change. Look for PWM signal when commanded.
- Perform voltage drop tests on the power feed and ground circuits while energizing the solenoid to detect poor connections.
- If wiring and solenoid test good, consider swapping with a known-good identical solenoid (if available) or bench-testing the valve body solenoids.
- If wiring and solenoid are good but no proper driver signal from TCM, inspect for TCM faults, and consider module testing or replacement as a last step.
- After repair, clear codes and perform a verification road test and recheck for recurrence.
Likely causes
- Failed or stuck shift solenoid E
- Open or high resistance in solenoid circuit (broken wire, connector issue)
- Contaminated transmission fluid causing solenoid sticking
- Faulty ground or power feed to the solenoid
- Defective TCM driver (less common)
Fault status
Status
Shift Solenoid E Performance — solenoid did not respond or is stuck off when commanded. Check solenoid, wiring, fluid, and TCM control.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
Similar codes
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Was this AI description helpful?
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Code
P0771
MERCEDES-BENZ
P — Powertrain
Shift Solenoid E Performance or Stuck Off
Views:
UK: 20
EN: 22
RU: 16
AI status
Completed
Completed
100%
Causes
- Faulty shift solenoid E (mechanically stuck or electrical failure)
- Open or shorted wiring to solenoid E (connector, harness damage, corrosion)
- Poor electrical connection (loose connector, corroded pins, poor ground)
- Low, dirty, or contaminated transmission fluid
- Faulty TCM/PCM driver circuit
- Internal transmission valve body or hydraulic fault
Symptoms
- Check Engine / Transmission warning light illuminated
- Gear shifting problems (harsh shifts, delayed shifts, or inability to shift into certain gears)
- Transmission may default to limp/limp‑in mode
- Reduced drivability or poor acceleration
- Transmission may stay in a single gear or not engage a gear
- Possible whining or unusual transmission noises if hydraulic internal issue
What to check
- Read freeze frame and live data with a scan tool; observe solenoid E commanded status and actual response
- Scan for related transmission or electrical codes
- Visual inspection of transmission fluid level and condition (color, smell, debris)
- Inspect connector and wiring for corrosion, looseness, damage or pin push‑outs
- Backprobe connector and check for proper battery voltage and ground while commanding the solenoid on/off
- Measure solenoid coil resistance and compare to manufacturer spec
Signal parameters
- Typical coil resistance (varies by vehicle): commonly ~6–30 ohms (consult spec for exact value)
- Control signal: PWM from TCM; duty cycle varies when commanded — voltage swings between ~0–12 V
- When commanded ON: driver should provide ground (or power) and coil should draw current (0.5–2 A typical depending on coil resistance)
- Open circuit: infinite/very high resistance; short to ground or battery: near 0 ohms or blown fuse
- Expect a change in measured circuit voltage or current when solenoid is switched on vs off
Diagnostic algorithm
- Retrieve all stored codes and freeze frame data. Note conditions under which the code set (engine speed, temp, gear, vehicle speed).
- Perform a quick road test or actuate solenoid using a scan tool while monitoring live data; verify whether TCM is commanding solenoid E and if the actual state changes.
- Check transmission fluid level and condition. If fluid is low or contaminated, correct and retest.
- Visually inspect the solenoid connector and wiring harness for damage, corrosion, chafing, or water intrusion. Repair any obvious damage.
- With ignition off, disconnect the solenoid connector and measure coil resistance across the solenoid terminals. Compare to spec. Replace solenoid if out of range or open/shorted.
- Backprobe the harness connector with ignition on (engine off) and verify reference voltage/power and ground presence. Command solenoid on/off and observe voltage/current change. Look for PWM signal when commanded.
- Perform voltage drop tests on the power feed and ground circuits while energizing the solenoid to detect poor connections.
- If wiring and solenoid test good, consider swapping with a known-good identical solenoid (if available) or bench-testing the valve body solenoids.
- If wiring and solenoid are good but no proper driver signal from TCM, inspect for TCM faults, and consider module testing or replacement as a last step.
- After repair, clear codes and perform a verification road test and recheck for recurrence.
Likely causes
- Failed or stuck shift solenoid E
- Open or high resistance in solenoid circuit (broken wire, connector issue)
- Contaminated transmission fluid causing solenoid sticking
- Faulty ground or power feed to the solenoid
- Defective TCM driver (less common)
Fault status
Status
Shift Solenoid E Performance — solenoid did not respond or is stuck off when commanded. Check solenoid, wiring, fluid, and TCM control.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
Similar codes
Your experience will help others
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Was this AI description helpful?
Your feedback helps improve AI descriptions.
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0
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