Home Auto Repair P0121 Throttle Position Sensor/Switch A Circuit Range/Performance Problem

P0121 Throttle Position Sensor/Switch A Circuit Range/Performance Problem

56

OBD-II Trouble Code Technical Description
Throttle Position Sensor/Switch A Circuit Range/Performance Problem

Potential Symptoms Symptoms of a P0121 trouble code could include: Malfunction Indicator Lamp (MIL) illumination (Check Engine Light or Service Engine Soon light) Intermittent stumble on acceleration or deceleration Blows black smoke on acceleration No start

Causes A code P0121 may mean that one or more of the following has happened: TPS has intermittent open or short internally Harness is rubbing and causing an open or short in the wiring Bad connection at the TPS Bad PCM (less likely) Water or corrosion in connector or sensor