P0224 Throttle/Pedal Position Sensor/Switch B Circuit Intermittent

P0224 points to an intermittent throttle or pedal position sensor B circuit fault. The redundant B signal drops out or becomes unstable.

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 clear intermittent throttle faults without reproducing the signal dropout and checking connector integrity.

Symptoms of P0224

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 P0224

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

Graph throttle or pedal sensor B while sweeping the pedal, applying light connector movement, and repeating vibration conditions.
Inspect connector locking, terminal tension, harness flex points, water intrusion, shared reference stability, and sensor track wear.
Compare intermittent B-signal loss with sensor A, commanded throttle, reduced-power mode, and freeze-frame throttle angle.

Related OBD-II codes

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