P2C78: The active grille air shutter module D is getting too hot
The active grille air shutter module D is getting too hot. It may be poor cooling, very demanding use or the part itself.
| Code | P2C78 |
|---|---|
| System | Engine and transmission |
| Group | P2Cxx, Engine, emissions and electrification |
| Type | Generic: it means the same on every make |
How to read and clear P2C78 with Final OBD
Plug an OBD2 scanner in under the steering wheel, switch the ignition on and open Final OBD. Under Faults you’ll see P2C78 with its description and whether it’s confirmed, pending or permanent.
If the engine stores it over standard OBD, with FREE you read this code with its explanation for nothing and clear it. With PRO you also read the faults of every control unit and clear them in all of them.
Clearing the code only turns the light off: if the cause is still there, it comes back. Clear it once it’s fixed, and not right before an inspection. It’s all in how to read and clear fault codes and in inspections and OBD.
Similar codes
- P2C74 The active grille air shutter C control gives readings outside the normal range
- P2C75 The active grille air shutter module C is getting too hot
- P2C76 The active grille air shutter D has got stuck
- P2C77 The active grille air shutter D control gives readings outside the normal range
- P2C8C Temperature sensor D of the DC to DC converter has an electrical fault
- P2C8D Temperature sensor D of the DC to DC converter gives readings that do not match
- P2C92 The supply to the traction battery contactors has a broken or disconnected wire
- P2C93 The power supply that drives the traction battery contactors gives readings
What does code P2C78 mean?
The active grille air shutter module D is getting too hot. It may be poor cooling, very demanding use or the part itself.
How do you clear P2C78?
With an OBD2 scanner and an app like Final OBD, which clears it for free if it’s stored by the engine control unit. But clearing it only turns the light off: if the cause isn’t fixed, P2C78 comes back.
Read it on your car
Final OBD reads and clears engine faults through standard OBD for free, each one explained in plain English. With PRO it also reads the faults of every control unit, each make’s own codes included, and clears them in all of them.
