P0222 — Throttle/Pedal Position Sensor B Circuit Low
Moderate severityWhat it means
P0222 is stored when the engine control unit sees a fault involving throttle/pedal position sensor B. Sensor B is the second, redundant throttle/pedal position signal that the control unit cross-checks against sensor A for safety. A “low” reading means the signal is stuck near the bottom of its range, which usually points to a short to ground or an internally failed sensor.
Common symptoms
- The live reading sits abnormally low or at zero
- Reduced power or limp mode
- Hesitation or poor throttle response
- Unstable idle
Likely causes
- Signal wire shorted to ground
- Internally failed sensor pulling the signal low
- Worn position sensor or throttle body
- Connector or wiring fault on the B circuit
What to check first
- Compare the live signal against a known-good range and check for a short to ground
- Compare sensor A and B percentages in live data — they should track together
- Inspect the connector and wiring
Can you keep driving?
Because B is a safety-redundant signal, the car often drops to reduced power; have it checked promptly.
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