Throttle Actuation Potentiometer Signal Out of Range
2022-2024 Audi Q4 e-tron Electric
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
- P0070Ambient Air Temperature Sensor Circuit
- P0071Ambient Air Temperature Sensor Range/Performance
- P0072Ambient Air Temperature Sensor Circuit Low
- P0073Ambient Air Temperature Sensor Circuit High
- P0115Engine Coolant Temperature (ECT) Sensor 1 Circuit
- P0116ECT Sensor 1 Circuit Range/Performance
- P0117ECT Sensor 1 Circuit Low Input
- P0118ECT Sensor 1 Circuit High Input
- P0119ECT Sensor 1 Circuit Intermittent
- P0125Insufficient Coolant Temperature for Closed Loop Fuel Control
P1543 on Other Vehicles
Common Questions
What does code P1543 mean on a 2022-2024 Audi Q4 e-tron?
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 Q4 e-tron?
Common symptoms of P1543 include: Check Engine Light, Reduced power mode, Throttle response limited, Engine may only idle.
What causes P1543 on a 2022-2024 Audi Q4 e-tron?
Common causes of P1543 include: Faulty throttle body potentiometer, Carbon buildup affecting sensor, Damaged wiring, Connector corrosion, Throttle body motor failure.