P0771: Shift Solenoid E Performance or Stuck Off
The Powertrain Control Module (PCM) monitors the shift solenoid 'E' circuit for proper operation. This code indicates that the solenoid or its circuit is malfunctioning, often due to an electrical fault, mechanical sticking, or transmission fluid issues. The solenoid controls hydraulic pressure to engage specific gears; when stuck off, it can cause harsh or delayed shifts, or prevent the transmission from shifting into certain gears.
1. Symptoms You Will Notice
- Check Engine Light illuminated
- Harsh or erratic shifting
- Transmission stuck in gear or fails to shift
- Reduced fuel economy
2. Most Common Causes
- Faulty or mechanically stuck shift solenoid E
- Low transmission fluid level or degraded fluid (burnt or contaminated)
- Short, open, or high resistance in the solenoid wiring
- Corroded, loose, or bent pins in the solenoid E electrical connector
- Obstructed valve body or stuck valves in the transmission
- Defective transmission control module (TCM) or powertrain control module (PCM)
3. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Check transmission fluid level and condition.
Step 3: Inspect wiring and connectors for damage or corrosion.
Step 4: Test solenoid resistance and power/ground circuits with a multimeter.
Step 5: Perform a solenoid actuation test using a scan tool.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause further transmission damage. Limited local driving may be possible if shifting is still functional, but immediate diagnosis is advised.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, including parts and labor. Solenoid replacement is often $50-$150 for the part, plus diagnostic and labor fees.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.