P00D8 code meaning
Turbocharger/Supercharger Bypass Valve B Temperature Too High
Powertrain system Generic code P00xx codes Check engine light
What P00D8 means
Bypass valve B is the electric compressor recirculation valve, mounted close to the hot compressor and turbine housing. This code reports that its temperature is too high. How the temperature is detected is not described in published manufacturer documents; a documented principle for comparable turbocharger solenoids estimates the coil temperature from current, supply voltage and duty cycle and protects the coil by limiting or switching it off. With the valve switched off, the compressor may surge when lifting off the throttle. None of the published manufacturer documents searched uses this code; the explanation follows regulations and comparable manufacturer monitors.
P00D8 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyEasy, DIY possible
- Typical labor0.5 to 1.5 hours
- Clears after repairAfter a drive cycle
Symptoms of P00D8
- Check engine light on (manufacturer-dependent)
- Whistling or fluttering when lifting off the throttle
- Slight loss of power
Common causes of P00D8
- PossibleValve energised for unusually long periods, e.g. due to boost control problems
- PossibleCoil with shorted turns or aged
- PossibleHeat shield missing or exhaust leak near the turbocharger
- Less likelyContact resistance or supply fault distorting the estimate
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Turbocharger bypass valve bTurbochargerHeat shield
What each part of P00D8 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. |
| D8 | The exact fault in that area. |
What to do next
- Note P00D8 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 P00D8
What does P00D8 mean?
P00D8 means "Turbocharger/Supercharger Bypass Valve B Temperature Too High". Bypass valve B is the electric compressor recirculation valve, mounted close to the hot compressor and turbine housing. It is a generic code, so it means the same on every make.
Is it safe to drive with P00D8?
Drive gently and only to a workshop. With P00D8 the car can go into limp mode (reduced power) to protect itself.
Will P00D8 fail an emissions test?
Yes, it can. P00D8 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 P00D8 to fix?
Difficulty: easy. A typical repair takes 0.5 to 1.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P00D8 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.