What does code P2C78 mean?

Q: What does code P2C78 mean?

Active Grille Air Shutter Module D Over Temperature. P2C78 indicates that the active grille air shutter module for shutter 'D' has reported an internal over-temperature condition to the powertrain control module. The module monitors its own motor and control circuitry, and when the calculated temperature exceeds a calibrated threshold, it sets this code and typically disables the shutter in a default position.

DTC codes / P2Cxx · Hybrid propulsion / P2C78

P2C78Active Grille Air Shutter Module D Over Temperature

P2C78 indicates that the active grille air shutter module for shutter 'D' has reported an internal over-temperature condition to the powertrain control module. The module monitors its own motor and control circuitry, and when the calculated temperature exceeds a calibrated threshold, it sets this code and typically disables the shutter in a default position.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaHybrid propulsion

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.