P0222: Throttle/Pedal Position Sensor/Switch B Circuit Low
Do not keep driving
Expect limp mode. If several throttle or pedal codes appeared together, that pattern points at a shared supply fault.
What this code means
Sensor B is reading below its valid range, typically a short to ground or a lost reference supply. Where sensor A reports a low-side fault at the same moment, the shared five-volt reference is the obvious suspect rather than two independent sensor failures.
Likely causes
Start here
- Wiring shorted to ground · moderate
- Failed sensor reference voltage supply · moderate
- Faulty accelerator pedal position sensor · moderate
Less common
- Corroded or loose connector · easy
Symptoms
Components involved
Information, not instruction
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Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
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