Bypass (recirculation or wastegate-type) valve sticking, leaking or not operating correctly, causing excessive heat build-up; Wiring or connector fault on the temperature sensor circuit giving a false high reading; Faulty temperature sensor reading too high; Exhaust leak or heat soak near the valve or sensor; Restricted intake, air filter, intercooler or charge pipe causing excess heat in the charge air system; Turbocharger or supercharger fault causing abnormal heat, or coolant or oil supply problem where the unit is cooled; Outdated control unit software where the manufacturer has issued a known correction.

P00D7

Turbocharger/Supercharger Bypass Valve A Temperature Too High.

Generic
Powertrain
Generic code
Medium severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
0: AreaFuel and air metering, auxiliary emission controls
D7: FaultThe specific fault in that area

What it means

P00D7 is a generic powertrain code meaning the control unit has detected that the temperature associated with turbocharger or supercharger bypass valve 'A' is too high. The unit saw a temperature reading, either from a sensor or a modelled value, above its permitted limit. How the temperature is measured or calculated, and where valve 'A' sits, depends on the vehicle and engine.

Symptoms

Engine warning light on
Reduced power or limp mode
Boost pressure lower than normal
Whistling, hissing or fluttering from the intake side
Poor throttle response or hesitation under load

Possible causes

Bypass (recirculation or wastegate-type) valve sticking, leaking or not operating correctly, causing excessive heat build-uplikely
Wiring or connector fault on the temperature sensor circuit giving a false high readingpossible
Faulty temperature sensor reading too highpossible
Exhaust leak or heat soak near the valve or sensorpossible
Restricted intake, air filter, intercooler or charge pipe causing excess heat in the charge air systempossible
Turbocharger or supercharger fault causing abnormal heat, or coolant or oil supply problem where the unit is cooledrare
Outdated control unit software where the manufacturer has issued a known correctionrare

How to diagnose

Read all stored and pending codes and the freeze frame data, noting engine load, intake air temperature and coolant temperature when the fault set
Check for related boost, turbo or temperature codes, as they help show whether the fault is mechanical or electrical
Visually inspect the sensor, its wiring and connector for heat damage, chafing, corrosion or loose pins
Inspect the bypass valve, its vacuum or electrical actuator and hoses for damage, leaks, sticking or carbon build-up
Check intake and charge air piping, air filter and intercooler for blockages, leaks or loose clamps
Inspect the exhaust manifold and turbo area for leaks or heat shield damage
Compare live sensor temperature with a known good reference such as a surface thermometer, with the engine at a stable temperature
Check for applicable manufacturer service bulletins or software updates for your model and engine

How to fix

Repair or replace the bypass valve or its actuator if it is sticking, leaking or faulty
Repair damaged wiring or connectors in the temperature sensor circuit
Replace the temperature sensor if its readings are incorrect
Repair exhaust leaks and refit or replace missing heat shields
Clear intake or intercooler restrictions and replace a blocked air filter
Update the control unit software only if an applicable update exists for this fault

Can I keep driving?

Medium severity

Short, gentle driving to a workshop is usually acceptable, but avoid heavy loads and high boost. If the car goes into limp mode, or you hear unusual noises or smell hot oil, stop and have it checked, as continued heat may damage the turbo or supercharger.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.