P028A

Charge Air Cooler Cooling Fan Control Circuit/Open

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–167 (est.)

Symptoms

Reduced engine power
Deterioration in response to the gas pedal
Possible engine overheating
Increased fuel consumption
Detonation knocks

Causes

Open/short circuit in wiring harness
Control relay fault
Fan motor failure
Problems with the engine control unit
Corrosion of contacts or connectors

How to Fix

Visual inspection of the wiring harness and contacts
Checking the operation of the fan and fuses
Diagnostics of resistance of electric motor windings
Testing signals from the control unit
Replacing damaged components
Reset error and test drive

Related codes

P0299 P0033 P0234 P0243