Throttle/Pedal Position Sensor "A" Range/Performance
The throttle position sensor (TPS) signal does not match the expected range for the commanded pedal position. On drive-by-wire vehicles, two redundant sensors are compared; a divergence between them or implausible motion triggers this code.
Affected components
- Throttle position sensor
- Throttle body
- Accelerator pedal sensor
Common causes
- High likelihood: TPS contact track worn (older potentiometer-type sensors)
- Medium likelihood: Carbon buildup blocking throttle plate
- Low likelihood: Corroded TPS connector
Possible symptoms
- Check engine light on
- Reduced throttle response, possible limp mode
- Hesitation or surging
- Idle too high or too low
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
- Reduced-power or limp mode may occur
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.