P2C78
Active Grille Air Shutter Module D Over Temperature
P2C78 is an OBD-II diagnostic trouble code meaning: Active Grille Air Shutter Module D Over Temperature. Common causes: mechanical jamming of the active grille flaps, problems with the electrical wiring to the module (break or short circuit). Estimated repair cost: $56–167.
Symptoms
- Check Engine light comes on
- Reduced engine cooling efficiency
- Increased fuel consumption
- Noises from the radiator grille area
- Engine power limitation on some models
Causes
- Mechanical jamming of the active grille flaps
- Problems with the electrical wiring to the module (break or short circuit)
- Damper control module malfunction
- Overheating due to contamination or obstructions
- Module power problems
How to Fix
- Visual inspection of the valves and mechanism for jamming
- Checking electrical connections and wiring to the module
- Module supply voltage diagnostics
- Cleaning the damper mechanism from dirt
- Replacing a faulty control module if necessary
Related codes
Error P2C78 by Vehicle Brand
FAQ
What does the P2C78 code mean?
P2C78 is an OBD-II diagnostic trouble code that indicates: Active Grille Air Shutter Module D Over Temperature
What causes a P2C78 error code?
The most common causes of P2C78 include: Mechanical jamming of the active grille flaps; Problems with the electrical wiring to the module (break or short circuit); Damper control module malfunction; Overheating due to contamination or obstructions.
How do I fix a P2C78 diagnostic trouble code?
To fix P2C78: Visual inspection of the valves and mechanism for jamming. Checking electrical connections and wiring to the module. Module supply voltage diagnostics. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2C78?
Yes, but get it checked soon
How much does it cost to fix P2C78?
The estimated repair cost for P2C78 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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