P028B

Charge Air Cooler Cooling Fan Performance/Stuck Off

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Reduced engine power
Increased fuel consumption
Intercooler overheating
Turbo lag or unstable turbine operation

Causes

Fan motor malfunction
Damage to wiring or wiring harness
Fan relay fault
Problems with the engine control unit (ECU)
Fan jammed due to contamination or mechanical damage

How to Fix

Check fan operation manually (rotation, resistance)
Diagnose voltage at fan terminals
Check the integrity of the wiring harness and connections
Check fan relay
Replace the fan or its components if necessary

Related codes

P0299 P00AF P012B