P1543
Throttle Actuation Potentiometer Signal Too Low
P1543 is an OBD-II diagnostic trouble code meaning: Throttle Actuation Potentiometer Signal Too Low. Common causes: throttle potentiometer malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $17–56.
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
Related codes
Error P1543 by Vehicle Brand
FAQ
What does the P1543 code mean?
P1543 is an OBD-II diagnostic trouble code that indicates: Throttle Actuation Potentiometer Signal Too Low
What causes a P1543 error code?
The most common causes of P1543 include: Throttle potentiometer malfunction; Open or short circuit in the sensor circuit; Poor contact in the sensor connector; Problems with the engine control unit.
How do I fix a P1543 diagnostic trouble code?
To fix P1543: Check the integrity of the sensor circuit. Inspect connectors and contacts for oxidation. Check potentiometer resistance. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1543?
Limited driving only, diagnose soon
How much does it cost to fix P1543?
The estimated repair cost for P1543 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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