U02A9

Lost Communication With Charge Air Cooler Coolant Pump A

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

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

U02AA U02AB U02A8