OBD-II code · Network
U05AA Invalid Data Received From Charge Air Cooler Coolant Pump
A receiving module detected implausible data from the charge air cooler (intercooler) coolant pump. Pump speed or flow values fail plausibility checks and are rejected.
Is it safe to drive with U05AA?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
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
- Cac Coolant Pump
Related codes
- U05A7Invalid Data Received From Safety Integration Control Module
- U05A8Invalid Data Received From NOx Sensor C
- U05A9NOx Sensor C Received Invalid Data From ECM/PCM
- U05ABInvalid Data Received From Engine Disconnect Clutch
- U05ACInvalid Data Received From Vehicle Thermal Management Control Module
- U05B2Invalid Data Received From Comfort and Convenience Display A
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.