P0771
Shift Solenoid E Performance/Stuck Off.
- Generic
- Powertrain
- Generic code
- Medium severity
How this code is built
- P
- SystemPowertrain
- 0
- Defined bySAE, the same on every car
- 7
- AreaTransmission
- 71
- FaultThe specific fault in that area
What it means
P0771 is the generic code for Shift Solenoid E performance or stuck off. The transmission control module commanded shift solenoid E to operate but saw a result that did not match, such as the wrong gear ratio, unexpected slip or incorrect pressure response. The solenoid's role and the gears it affects depend on the transmission design.
Symptoms
- Gearbox warning light or malfunction indicator lamp on
- Harsh, delayed or flared gear changes
- Transmission stuck in one gear or in limp mode
- Slipping or engine revving between gears
- Loss of a particular gear or no engagement of a gear
- Poor fuel economy or sluggish acceleration
Possible causes
- Low, degraded or contaminated transmission fluidlikely
- Shift solenoid E sticking or worn internallylikely
- Blocked valve body passages or debris/sludge restricting hydraulic flowlikely
- Damaged wiring, poor connector contact or corrosion in the solenoid or transmission harnesspossible
- Worn valve body bores or internal hydraulic leaks causing pressure losspossible
- Worn clutch packs or internal transmission mechanical fault giving slippossible
- Faulty transmission control module or outdated software calibrationrare
How to diagnose
- Read all stored and pending codes and freeze frame data, noting gear, temperature and speed when the fault set, and check for related solenoid or ratio codes.
- Check for manufacturer technical bulletins and software updates for the specific model and transmission.
- Check transmission fluid level, condition and smell using the manufacturer's procedure, as the method varies by model.
- Inspect the transmission harness and connector for chafing, fluid ingress, corrosion and bent or loose pins.
- Test solenoid E circuit for resistance, supply, ground and control signal against the manufacturer's specification.
- Use live data to compare commanded and actual gear, ratio, slip and solenoid duty during a road test.
- Perform a line pressure test or hydraulic checks as specified for the transmission.
- Inspect the pan and filter for debris or clutch material, and if the valve body is accessible, check the solenoid and valve movement.
How to fix
- Correct the fluid level or replace degraded fluid and filter with the specified type.
- Repair or replace damaged wiring and connectors in the solenoid circuit.
- Replace shift solenoid E, or the solenoid pack if it is not serviced separately.
- Clean, repair or replace the valve body if it is contaminated or worn.
- Overhaul or replace the transmission if internal clutch wear or pressure loss is confirmed.
- Update the transmission control module software if an outdated calibration is a known cause for that model.
Can I keep driving?
Medium severity
The car can usually be driven short distances carefully, but avoid heavy loads and hard acceleration as slip can quickly damage the transmission. Get it diagnosed soon, and stop driving if the gearbox slips badly or will not engage a gear.
Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.