P0220Throttle/Pedal Position Sensor/Switch B Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- With electronic throttle control the throttle body carries two position sensors, A and B, usually with opposite or offset signals, and the engine module compares them (correlation code P2135). GM and Ford give the pedal sensors their own codes (P2120 ff), so B is in practice the second throttle sensor. P0220 is the general circuit fault of sensor B without telling low from high. GM uses it in a special sense on 2015–2016 V8 engines: the signal lies outside 0.25–4.59 V only in the monitoring processor while the main processor sees it as valid; this sets immediately with the warning light. Newer GM and Ford engines report sensor B faults as P0222/P0223. The module carries on with sensor A, limits throttle opening and power and switches off cruise control.
- What you may notice
- Check engine light and throttle warning light
- Reduced power, limp mode
- Poor throttle response, jerking
- Cruise control disabled
- Likely causes
- LikelyThrottle body or sensor B faulty (worn track)
- LikelyWiring or connector at the throttle body (corrosion, break)
- Possible5 V reference disturbed (short in another sensor on the same reference)
- RareEngine module input or monitoring processor faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €80 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.