U01BC

Lost Communication With Charge Air Cooler Coolant Pump B

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Charge air overheating
The engine goes into emergency mode
Increased fuel consumption

Causes

Open or short circuit in the pump circuit
Intercooler coolant pump malfunction
Problems with connectors or wiring
Faulty relay or fuse
Problems with the engine ECU

How to Fix

Check the pump fuse and relay
Diagnose the power supply and pump control circuit
Check connectors and wiring harness for damage
Test the coolant pump
If necessary, replace the pump or wiring

Related codes

U01BB U01BD U01BA