U04A0

Invalid Data Received From Engine Coolant Pump Control Module

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Engine overheating
Unstable operation of the cooling system
Errors in other related systems

Causes

Coolant pump control module malfunction
Problems with wiring or connectors
Coolant pump malfunction
CAN bus problems
Software error in the ECU

How to Fix

Check the condition of the coolant pump
Check the integrity of wiring and connectors
Diagnose the pump control module
Check the functionality of the CAN bus
Update ECU software if necessary

Related codes

U04A1 U04A2 U0100