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January 3rd 2026

P0121 / ROVER

Throttle Position Sensor Output Signal Error Fault

Notes:

January 3rd 2026

P0121 / MOPAR

THROTTLE POSITION SENSOR 1 PERFORMANCE

Notes:

January 3rd 2026

P0121 / JEEP

Throttle Position Sensor 1 Performance

Notes:

January 3rd 2026

P0121 / GENERIC

Throttle Position Sensor/Switch A Circuit Range/Performance Problem

Notes:

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NOTE: Results from this database are the beginning of the diagnostic process, further investigation should be performed to confirm results before you begin repairs.