Code result
P2C78
Active Grille Air Shutter Module D Over Temperature
Moderate severity
What it means
The control module of active grille air shutter D reports junction temperature above its protection threshold. Thermal protection has triggered.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Under-bonnet temperature too high
highOne of the most commonly reported causes for this code — check this first.
Sustained stall current
mediumA plausible cause — test and verify before replacing parts.
Related help
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