Powertrain
generic / SAE
P0221
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.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number2 / 21
Possible causes
- Resistive track worn high
- Throttle plate sticking medium
- Sensor element aged beyond calibration window low
Symptoms
- Check engine light on
- Reduced throttle response, possible limp mode
- Hesitation or surging
- Idle too high or too low
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 80–600 €
- Estimated time: 0.3–2.5 h
- Component: throttle position sensor b
- Component: throttle body
- MIL / check engine light
- emissions-relevant
- limp mode possible
Sources
References
sae:J2012