Code U0351 indicates that the vehicle's main control module has detected a software version mismatch or incompatibility with the Active Grille Air Shutter (AGS) module. This prevents the system from correctly managing airflow to the radiator for cooling or aerodynamics.
An AGS module with an incorrect part number or software revision was installed that is not compatible with the vehicle's VIN.
Internal memory corruption within the AGS module causing it to report an invalid or incompatible software ID.
An interrupted or unsuccessful firmware update left the module in a state that the main computer no longer recognizes.
Intermittent power or ground faults causing data corruption during the handshake between the AGS module and the PCM.
The engine control module has a corrupted configuration file that incorrectly flags the AGS module as incompatible.
It is highly unlikely that the PCM hardware is the cause. This code typically refers to a software mismatch within the AGS module itself or a need for a software update.
Yes, the vehicle will remain drivable, but you may experience slightly lower fuel efficiency or suboptimal engine cooling.
Only if the current module has the wrong part number or if the internal electronics have failed and cannot be reflashed.