Powertrain
generic / SAE
P0789
Shift Timing Solenoid A Intermittent
Shift timing solenoid A signal jumps or drops out — vibration, loose connector or thermal sensitivity.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number7 / 89
Possible causes
- Loose connector at the transmission high
- Connector with intermittent contact under vibration low
- Harness routed against vibrating component low
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
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 200–1000 €
- Estimated time: 0.8–3 h
- Component: shift timing solenoid a
- Component: tcm
- MIL / check engine light
Sources
References
sae:J2012