P0222Throttle/Pedal Position Sensor/Switch B Circuit Low
- 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. P0222 means the signal of sensor B is below its lower limit – GM about 0.25 V, Ford below 0.25 V – typically a short to ground, an open signal wire or a missing 5 V reference. Both detect it within about a second and switch the warning light on in the first trip. If the shared reference fails, several sensors report low at once. 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
- LikelySignal or 5 V wire open or shorted to ground
- LikelyThrottle body or sensor B faulty internally
- Possible5 V reference pulled down by another sensor
- PossibleConnector corrosion or water ingress
- RareEngine module 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.