اردو

P0120: Throttle Position Sensor A Circuit Malfunction

Short answer: P0120 means “Throttle Position Sensor A Circuit Malfunction”. It is a standard OBD-II code, so the basic meaning is the same on every car. Below is what it means on each of the 8 cars we cover, with a link to the full page for each car.

Standard OBD-II code Same meaning on all cars (SAE J2012).

P0120 on each car

CarMeaning on this carConfidence
Toyota Passo (1st gen)Throttle/Pedal Position Sensor (P0120/41)high
Toyota Vitz (1st gen)Throttle position sensor circuit (P0120/41)medium
Toyota Corolla (9th gen, E120)THROTTLE/PEDAL POSITION (P0120/41)high
Toyota Corolla (9th gen, E120)THROTTLE/PEDAL POSITION (P0120/41)high
Toyota Corolla (9th gen, E120)THROTTLE/PEDAL POSITION (P0120/41)high
Toyota Corolla (11th gen, E170)Throttle Position Sensor A Circuit Malfunctionmedium
Toyota Corolla (10th gen, E140)Throttle Position Sensor A Circuit Malfunctionmedium
Honda City (5th gen, GM2)Throttle Position Sensor A Circuit Malfunctionmedium
Honda Civic (10th gen, FC)Throttle Position Sensor A Circuit Malfunctionmedium
Suzuki Wagon R (Pakistan, K10B)Throttle Position Sensor A Circuit Malfunctionmedium

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

Likely 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, in order

  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

Causes and checks above are the general meaning. The exact test steps and values differ by car: open your car’s page.

All fault codes