P0120 – Throttle Position Sensor A Circuit Malfunction
- System
- Engine
- Dashboard light
- Check engine light (MIL)
- Check-engine blink code
- —
- Applies to
- Generic OBD-II meaning. Not every code is used by this car.
- Description
- Throttle Position Sensor A Circuit Malfunction
- Detection / symptoms
- 1.Check engine light on 2.Potential symptoms include 3.Misfiring at idle or at highway speed 4.Poor idle quality 5.Possibly won't idle 6.Possibly starts and stalls
- Possible causes
- 1.Potential causes of the P0120 code include 2.Sticking throttle return spring 3.MAP or TPS connector corrosion 4.Misrouted harness causing chafing 5.Bad TPS 6.Bad PCM
- What to check
- 1.Read the code and freeze-frame data with an OBD-II scanner 2.Check the connector and wiring of the part named in the code 3.Test the part with scanner live data or a multimeter, using the values in the repair manual 4.Fix the cause, clear the code and test-drive
- Confidence
- medium (generic OBD-II definition, not checked against the factory manual for this car)
Generic OBD-II meaning (obd-codes.com), not checked against this car's factory manual. Clear the code and test-drive to confirm it returns. Search all fault codes · Common problems · Warning lights