The P0787 code in your 2020 Buick Encore indicates the shift timing solenoid circuit is reading lower than expected. This 6-speed automatic transmission fault points to reduced electrical signal in the timing solenoid circuit.
Encore Transmission System
The Buick Encore uses a 6-speed automatic designed for efficient city and highway driving. The shift timing solenoid controls precise gear engagement timing. A low circuit reading suggests reduced voltage or current flow.
What Causes Low Solenoid Reading
- Open circuit in solenoid wiring
- Short to ground draining voltage
- Solenoid coil resistance too high
- Poor power supply to circuit
- TCM driver circuit weakness
- Damaged connector allowing voltage drop
Symptoms of P0787
- Shift timing problems
- Check engine light on
- Delayed gear engagement
- Erratic shift quality
- Possible slip sensation
- Reduced performance
Encore Urban Usage
Many Encores are used for city driving with frequent stop-and-go traffic. Shift timing issues are particularly noticeable in these conditions where gear changes are constant.