P0821
PowertrainTransmission Shiftmoderate severityGear Lever X Position Circuit
What P0821 Means
The PCM detected a fault in the gear lever X position circuit signal. This affects the vehicle's ability to correctly interpret shifter lateral position.
Symptoms
- Incorrect gear selection
- Shifting problems
- Warning light on
Common Causes
- Faulty gear lever X position sensor
- Damaged wiring or connector
- Corroded contacts
- Faulty PCM/TCM
Diagnostic Steps
- Scan for related codes
- Test X position sensor signal
- Inspect wiring and connectors
- Verify PCM input readings
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Community Confirmed Fixes
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