P2C7ETurbocharger Turbine Inlet Valve Motor Driver Overtemperature
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2C7E indicates that the driver circuit for the turbine inlet valve motor has grown too hot. Driver chips monitor their own junction temperature and switch off beyond a limit, as the data sheet of NXP's MC33926 H-bridge shows. No manufacturer documents P2C7E publicly; the closest published example is GM's 3.0-litre diesel, where P2B99 for the exhaust pressure valve sets once the H-bridge driver exceeds 170 °C in 240 of 300 samples (Type A, table 25OBDG04B). Heat builds up when the motor has to hold against a stiff or binding valve for long periods, when windings are partly shorted, or when an actuator with built-in electronics sits close to hot turbo parts, a risk the Korean actuator patent also names. After shutdown the valve is uncontrolled and boost is reduced. P2C7D is the overcurrent fault.
- What you may notice
- Loss of boost after a longer drive or under high load
- Check engine light, possibly limp mode
- Fault may disappear after the engine has cooled down
- Likely causes
- LikelyBinding valve that keeps the motor under constant load
- PossiblePartially shorted motor windings raising current and heat
- PossibleActuator electronics overheated by missing heat shield or poor cooling
- RareDefective driver stage reporting overtemperature
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.