U02A9
Lost Communication With Charge Air Cooler Coolant Pump A
U02A9 is an OBD-II diagnostic trouble code meaning: Lost Communication With Charge Air Cooler Coolant Pump A. Common causes: open or short circuit in the pump circuit, intercooler coolant pump malfunction. Estimated repair cost: $56–167.
Symptoms
- Reduced engine power
- Check Engine Light Illuminates
- Possible increase in engine temperature
- Unstable engine operation at high speeds
Causes
- Open or short circuit in the pump circuit
- Intercooler coolant pump malfunction
- Problems with the wiring harness or connectors
- Engine control unit malfunction
- Problems with power or grounding of the pump
How to Fix
- Check the integrity of the pump power supply circuit
- Check the condition of the connectors and wiring harness
- Test the pump's performance
- Check fuses and relays associated with the pump
- If necessary, replace the intercooler coolant pump
Related codes
Error U02A9 by Vehicle Brand
FAQ
What does the U02A9 code mean?
U02A9 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Charge Air Cooler Coolant Pump A
What causes a U02A9 error code?
The most common causes of U02A9 include: Open or short circuit in the pump circuit; Intercooler coolant pump malfunction; Problems with the wiring harness or connectors; Engine control unit malfunction.
How do I fix a U02A9 diagnostic trouble code?
To fix U02A9: Check the integrity of the pump power supply circuit. Check the condition of the connectors and wiring harness. Test the pump's performance. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U02A9?
Limited driving only, diagnose soon
How much does it cost to fix U02A9?
The estimated repair cost for U02A9 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat