OBD-II code · Network
U05C1 Invalid Data Received From Active Radiator Air Flow Control Module A
A receiving module detected implausible data from active radiator air flow control module A. Active grille shutter or fan staging values fail plausibility checks and are rejected.
Is it safe to drive with U05C1?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyModule internal fault or sensor input drift
- PossibleSoftware version mismatch after replacement
- Less likelyGateway module routing CAN messages incorrectly
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Usually unaffected
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Active Radiator Airflow Module A
Related codes
- U05BEInvalid Data Received From Night Vision Control Module
- U05BFInvalid Data Received From Trailer Backup Assist Control Module
- U05C0Invalid Data Received From Interior Lighting Control Module B
- U0600Internal Control Module Memory Reset
- U0601Internal Control Module Software Incompatibility
- U0602Lost Communication With Particulate Filter Pressure Sensor B
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.