P0222: Throttle/Pedal Position Sensor/Switch B Circuit Low Input

What does P0222 mean?

Position channel B is below its expected electrical range. A signal pulled toward ground may make the computer distrust throttle demand and restrict power even though the driver is moving the pedal.

Generic OBD-II definition: Throttle/Pedal Position Sensor/Switch B Circuit Low Input. Confirm applicability in your vehicle service information.

Common causes

• B signal shorted to ground
• Faulty sensor or poor installation
• Lost reference supply or connector damage

Symptoms

• Low or rough idle
• Little acceleration
• Stalling or surging

Diagnostic focus

Check whether several sensors have reference-supply codes. A shared reference fault can make a good throttle sensor read low; replacing the throttle body will not fix a shared wiring short.

Can I keep driving with P0222?

Severity: High Unreliable throttle response can be dangerous. Do not continue driving with surging, stalling, or reduced acceleration that makes traffic unsafe; arrange recovery instead. Do not force an electronic throttle plate.

If the check engine light is flashing or the car runs badly, stop driving and have it checked.

Typical fixes

• Verify sensor B supply and ground
• Inspect for a grounded signal wire
• Test channel B while watching the other position channel

Sources & review

• OBD-Codes.com: P0222
• TroubleCodes.net: generic code definitions

Definitions and diagnostic background checked 2026-11-06. Generic guidance, not a substitute for the service procedure for your exact year, engine, and transmission.