The P0772 trouble code indicates that shift solenoid E in the transmission is stuck in the on position. Shift solenoids are responsible for controlling the flow of transmission fluid to engage or disengage specific gears, allowing for smooth shifting. Solenoid E typically controls the operation of the fifth gear.
Shift Solenoid “E” Stuck On
Code symptoms P0772.
1. Check Engine Light (CEL) illuminated on the dashboard.
2. Transmission shifting issues, such as harsh or delayed shifting, or failure to shift at all.
3. Vehicle may go into limp mode to prevent further damage.
4. Decreased fuel efficiency due to improper transmission shifting.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P0772.
1. Electrical problems with shift solenoid E, such as a short circuit, open circuit, or high resistance.
2. Mechanical problems within the transmission affecting solenoid operation, such as valve body issues or internal component wear.
3. Low transmission fluid level or contaminated fluid.
4. Faulty transmission control module (TCM) or engine control module (ECM).
Code Solutions P0772.
1. Begin by checking the transmission fluid level and condition. Low fluid level or contaminated fluid can cause transmission shifting issues. If necessary, top up or replace the fluid following the manufacturer’s recommendations.
2. Use a scan tool to clear the trouble codes and monitor the transmission’s behavior during a test drive. Note any abnormal shifting patterns or symptoms.
3. Perform a visual inspection of the wiring harness and connectors associated with shift solenoid E for damage, corrosion, or loose connections. Repair or replace any damaged wiring or connectors.
4. Use a multimeter to perform voltage and continuity tests on the shift solenoid and related circuits to check for proper operation. Ensure that the solenoid is receiving power and ground as commanded by the TCM or ECM.
5. If the solenoid and circuits check out okay, consider performing a hydraulic pressure test on the transmission to verify proper fluid pressure. This can help identify any internal transmission issues affecting solenoid operation.
6. If you’re unable to diagnose or repair the issue yourself, consider seeking assistance from a qualified mechanic or transmission specialist. They have the expertise and specialized equipment needed to diagnose and repair transmission problems effectively.