P00C0Turbocharger/Supercharger Bypass Valve B Control Circuit
- 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. P00C0 is the general circuit fault, usually an open circuit in the control circuit of this valve; the circuit is monitored continuously.
- What you may notice
- Check engine light on
- Fluttering or surging noise when lifting off the throttle
- Boost fluctuations, loss of power
- Likely causes
- LikelyWiring or connector damaged by turbocharger heat
- PossibleValve coil open or shorted
- RareOutput driver in the engine control module faulty
- 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.