Throttle Actuation Potentiometer Signal Out of Range
2000-2003 Audi S6 4.2L V8 🇨🇦
Description
The ECU detected that the throttle actuation potentiometer signal is outside the valid voltage range. The ECU uses dual potentiometers for safety and this fault indicates one has drifted or failed.
Symptoms
- Check Engine Light
- Reduced power mode
- Throttle response limited
- Engine may only idle
Common Causes
- Faulty throttle body potentiometer
- Carbon buildup affecting sensor
- Damaged wiring
- Connector corrosion
- Throttle body motor failure
Diagnostic Steps
- Read both throttle position values with scan tool
- Check signal voltage range at connector
- Clean throttle body
- Inspect wiring and connector
- Perform throttle body basic setting
Repair Notes
Clean throttle body and perform basic setting; replace throttle body if potentiometer has failed.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1543 on Other Vehicles
Common Questions
What does code P1543 mean on a 2000-2003 Audi S6?
P1543 stands for "Throttle Actuation Potentiometer Signal Out of Range". The ECU detected that the throttle actuation potentiometer signal is outside the valid voltage range. The ECU uses dual potentiometers for safety and this fault indicates one has drifted or failed.
What are the symptoms of P1543 on a Audi S6?
Common symptoms of P1543 include: Check Engine Light, Reduced power mode, Throttle response limited, Engine may only idle.
What causes P1543 on a 2000-2003 Audi S6?
Common causes of P1543 include: Faulty throttle body potentiometer, Carbon buildup affecting sensor, Damaged wiring, Connector corrosion, Throttle body motor failure.