P00C0 code meaning
Turbocharger/Supercharger Bypass Valve B Control Circuit
Powertrain system Generic code P00xx codes Check engine light
What P00C0 means
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.
P00C0 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2 hours
- Clears after repairAfter a drive cycle
Symptoms of P00C0
- Check engine light on
- Fluttering or surging noise when lifting off the throttle
- Boost fluctuations, loss of power
Common causes of P00C0
- Most likelyWiring or connector damaged by turbocharger heat
- PossibleValve coil open or shorted
- Less likelyOutput driver in the engine control module faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Turbocharger bypass valve bTurbocharger bypass valve wiringEngine control module
What each part of P00C0 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 0 | Area: fuel and air metering and auxiliary emission controls. |
| C0 | The exact fault in that area. |
What to do next
- Note P00C0 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P00C0
What does P00C0 mean?
P00C0 means "Turbocharger/Supercharger Bypass Valve B Control Circuit". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P00C0?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P00C0 fail an emissions test?
Yes, it can. P00C0 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P00C0 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P00C0 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.