U0623

Lost Communication With Coolant Pump A

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–167 (est.)

Symptoms

Engine overheating
Unstable engine operation
Check Engine Light Is On
Reduced cooling system efficiency

Causes

Open or short circuit in wiring
Coolant pump malfunction
Problems with connectors
ECU malfunction

How to Fix

Check the integrity of wiring and connectors
Check the functionality of the coolant pump
Check fuses and relays
Carry out ECU diagnostics

Related codes

U0624 U0625 U0626