Throttle/Pedal Position Sensor/Switch "B" Range/Performance
The B channel of the throttle or pedal position sensor reports values that do not correlate with the A channel or with engine load. Often caused by mechanical wear in the resistive track or by a sticking pedal/throttle plate.
Affected components
- Throttle position sensor b
- Throttle body
Common causes
- High likelihood: Resistive track worn
- Medium likelihood: Throttle plate sticking
- Low likelihood: Sensor element aged beyond calibration window
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
- 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.