P00C3Turbocharger/Supercharger Bypass Valve B Control Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- Bypass valve B is the compressor recirculation (diverter) valve of turbocharger B, not the wastegate: it lets charge air flow back to the compressor inlet when the throttle closes quickly, so the compressor does not surge. Turbocharger B is the second turbocharger in exhaust flow on series systems and the turbocharger of bank 2 on parallel twin-turbo engines. With P00C3 the circuit is electrically intact, but the valve does not behave as commanded, for example because it sticks or its position feedback is implausible. No manufacturer description naming this exact code was found; the explanation follows its documented counterpart.
- What you may notice
- Check engine light on
- Fluttering or surging noise when lifting off the throttle
- Boost fluctuations, loss of power
- Likely causes
- LikelyValve sticking or coked
- PossibleDiaphragm or piston worn
- PossiblePosition feedback implausible
- 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: €60 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.