Network & communication
Enriched, not yet reviewed
Lights the check engine lamp
U05AA: Invalid Data Received From Charge Air Cooler Coolant Pump
Standardized SAE J2012 code · U05xx codes
What does U05AA mean?
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.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
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
Common causes
- High Module internal fault or sensor input drift
- Medium Software version mismatch after replacement
- Low Gateway module routing CAN messages incorrectly
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of U05AA on the same make and model first.
U05AA in the community
Ask about U05AANo one has posted about U05AA yet
Share your vehicle, the tool you used and what you tested — the first thread helps everyone who searches for this code.
Describe your U05AA problem