P1543
Throttle Actuation Potentiometer Signal Too Low
Severity
⚠️ MediumCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–56 (est.)
Symptoms
- Reduced engine power
- Unstable idling
- Check Engine Light Illuminates
- The car goes into emergency mode
- Acceleration problems
Causes
- Throttle potentiometer malfunction
- Open or short circuit in the sensor circuit
- Poor contact in the sensor connector
- Problems with the engine control unit
- Mechanical damage to the throttle assembly
How to Fix
- Check the integrity of the sensor circuit
- Inspect connectors and contacts for oxidation
- Check potentiometer resistance
- Replace the throttle position sensor if necessary
- Test the operation of the throttle assembly