What does code P0788 mean?

Q: What does code P0788 mean?

Shift/Timing Solenoid High. P0788 indicates that the transmission control module has detected an abnormally high voltage or current on the shift/timing solenoid circuit, which is used to control shift quality and timing in automatic transmissions. The computer compares the commanded solenoid state to the actual electrical feedback and sets this code when the signal exceeds the expected range, often indicating a short to power or a failed solenoid.

DTC codes / P07xx · Transmission / P0788

P0788Shift/Timing Solenoid High

P0788 indicates that the transmission control module has detected an abnormally high voltage or current on the shift/timing solenoid circuit, which is used to control shift quality and timing in automatic transmissions. The computer compares the commanded solenoid state to the actual electrical feedback and sets this code when the signal exceeds the expected range, often indicating a short to power or a failed solenoid.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaTransmission

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.