OBD-II code · Network
U046C Invalid Data Received From A/C Compressor Control Module
A receiving module detected implausible data from the A/C compressor control module (typically the inverter for an electric scroll compressor). Speed or torque values fail plausibility checks and are rejected.
Is it safe to drive with U046C?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
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
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Usually unaffected
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- AC Compressor Module
Related codes
- U0469Invalid Data Received From Starter / Generator Control Module
- U046AInvalid Data Received From Sunroof Control Module
- U046BInvalid Data Received From Global Positioning System Module
- U046DInvalid Data Received From Fuel Pump Control Module B
- U046EInvalid Data Received From Exhaust Gas Sensor Module B
- U0471Invalid Data Received From Restraints System Sensor A
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.