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P0788 is a diagnostic trouble code (DTC) for "Shift/Timing Solenoid High". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
The P0788 code is a generic powertrain code related to the transmission. When this code is stored, it means that the engine control module (ECM) has found a problem with the shift/timing solenoid, specifically that the voltage to the timing valve is registering higher than allowed preset parameters.
Codes related to the P0788 include:
When a code P0788 is stored, the ECM has detected a high voltage from the timing solenoid valve transmission control module (TCM) terminal, even though the TCM is commanding the timing solenoid valve to turn off. The ECM may be registering that the vehicle is in a different gear than it actually is.
Shift solenoids are used by an automatic transmission to manage the transfer of fluid between hydraulic circuits in order to make a change in the transmission gear ratio.
Several problems may cause a P0788 code including:
Symptoms of a P0788 code may include:
A mechanic may use several methods to diagnose a P0788 trouble code, including:
It’s possible to diagnose a P0788 code as a faulty shift solenoid issue, when the problem is an issue related to the shift solenoid circuit. It is recommended to check and test all electrical wiring and circuitry carefully before proceeding with repairs.
Because a vehicle’s safe driving operation may be impacted due to faults that store a P0788 code, this code is considered a potentially serious code. When this code appears, it is recommended to immediately take your vehicle to your local service center or mechanic for repair and diagnosis.
Several repairs can fix a P0788 trouble code and include:
Typically, additional shift solenoid codes will be stored along with the P0788 code. It is recommended to always diagnose and repair trouble codes in the order in which they appear.
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