OBD-II code · Powertrain (generic)
P0788 Shift Timing Solenoid A High
Shift timing solenoid A control circuit reads stuck high — short to battery voltage or open coil/return.
Is it safe to drive with P0788?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyControl wire shorted to battery voltage
- PossibleOpen solenoid coil
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.8–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Shift Timing Solenoid A, Tcm
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.