P0931
PowertrainTransmission Solenoidmoderate severityGear Shift Lock Solenoid Control Circuit Intermittent/Erratic
What P0931 Means
The gear shift lock solenoid circuit is showing intermittent or erratic signals. This often results from loose connections or damaged wiring.
Symptoms
- Intermittent shifter lock
- Occasional inability to leave park
- Transmission warning light flickers
Common Causes
- Loose or corroded connector
- Chafed wiring harness
- Failing shift lock solenoid
- Intermittent TCM driver fault
Diagnostic Steps
- Check for stored and pending codes
- Wiggle test the harness and connectors
- Inspect for corrosion or damage
- Monitor circuit while operating shifter
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