P1231
Throttle Position Sensor 1 and 2 Circuit
Severity
⚠️ MediumCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–56 (est.)
Symptoms
- Unstable engine idling
- Loss of engine power
- Jerks during acceleration
- Check Engine light comes on
- Increased fuel consumption
Causes
- Throttle Position Sensor Malfunction
- Open or short circuit in wiring
- Poor contact in sensor connectors
- Engine control unit malfunction
- Mechanical throttle problems
How to Fix
- Check the condition of the throttle position sensors
- Inspect the wiring harness and connectors for damage.
- Check the resistance and output voltage of the sensors
- Clean the throttle valve and check its mechanical operation
- If necessary, replace faulty sensors