Powertrain, generic · Fuel and air metering, auxiliary emission controls

P00D7 Turbocharger/Supercharger Bypass Valve A Temperature Too High

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

Bypass valve A 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.

Likely causes

Valve energised for unusually long periods, e.g. due to boost control problems
Coil with shorted turns or aged
Heat shield missing or exhaust leak near the turbocharger
Contact resistance or supply fault distorting the estimate

Symptoms

  • Check engine light on (manufacturer-dependent)
  • Whistling or fluttering when lifting off the throttle
  • Slight loss of power

Repair estimate

DifficultyEasyDIY possible
Parts and labour€40–250
Time0.5–1.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

turbocharger bypass valve aturbochargerheat shield

Related codes

P00D8P0033P0039P0299

References: law.cornell.edu, newtonnet.co.uk, patents.google.com, ms-motorservice.com.