P0229Throttle/Pedal Position Sensor/Switch C Circuit Intermittent
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Sensor C is a third throttle or pedal position signal; its role depends on the manufacturer. Ford uses it for the sensor of the second throttle body on engines with two throttles and digital (SENT) sensors, GM does not use it. P0229 reports a fault of sensor C that comes and goes. Ford documents it exactly: if its digital sensor on the second throttle body reports a fault for more than 0.4 s, P0229 sets; if the fault persists beyond 4 s it becomes P0225. Both switch on the warning light and the wrench light. Typical causes are a loose contact at the second throttle body's connector or chafed wiring.
- What you may notice
- Check engine light and wrench light (Ford)
- Brief jerking or loss of power
- Occasional limp mode
- Likely causes
- LikelyLoose contact at the second throttle body connector (spread pins, corrosion)
- PossibleHarness chafing with intermittent short or open
- PossibleSensor or second throttle body with an internal intermittent fault
- RareVoltage dips in the supply or ground
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €30 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.