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

P0223 indicates a high input from throttle or pedal position sensor/switch B. The redundant channel voltage is higher than expected.

Code details

Generic OBD-II · P0

System: Fuel / Air
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not replace modules before checking sensor B wiring; redundant throttle circuits are sensitive to small signal faults.

Symptoms of P0223

Check-engine light on, sometimes with rough or uneven running.
Hesitation, surging, or a noticeable change in fuel economy.
Occasionally hard starting or a smell of unburnt fuel.

Common causes of P0223

A failing or contaminated sensor (MAF, MAP, oxygen or air-fuel sensor).
Intake or vacuum leaks, or an exhaust leak near an upstream sensor.
Wiring, connector, or fuel-delivery problems that skew the reading.

Useful checks before replacing parts

Check for short-to-voltage, open ground, poor connector contact, and a sensor B signal stuck high.
Compare sensor B with sensor A, commanded throttle angle, and pedal position data.
Inspect harness routing near the throttle body and pedal assembly for chafing, water intrusion, or prior repairs.

Related OBD-II codes

These nearby fuel / air entries can help compare wording and pin down the fault area.