P0223: Throttle/Pedal Position Sensor/Switch B Circuit High Input

What does P0223 mean?

The B position-sensor circuit reports a voltage above its permitted range. The computer may enter reduced-power mode because redundant throttle or pedal inputs no longer provide trustworthy position information.

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

Common causes

• B signal shorted to a supply
• Open return or connector problem
• Internal position-sensor failure

Symptoms

• Reduced engine power
• Erratic pedal response
• Check engine light

Diagnostic focus

If this appears alongside P2135, verify both position signals and their shared connections. A high B signal can produce a correlation fault without a separate motor failure.

Can I keep driving with P0223?

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

• Check B signal, return, and reference to the wiring diagram
• Inspect throttle/pedal connectors for corrosion
• Replace only the assembly shown faulty by the tests

Sources & review

• OBD-Codes.com: P0223
• 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.