P028B
Charge Air Cooler Cooling Fan Performance/Stuck Off
Generic OBD-II
Common symptoms
What you'll notice
- Check the charge air cooler cooling fan for any obstructions or damage
- Inspect the fan wiring and connections for any loose or damaged wires
- Test the charge air cooler cooling fan relay to ensure it is functioning properly
- Verify that the charge air cooler itself is not clogged or restricted
- If all else fails, replace the charge air cooler cooling fan with a new one
Common causes
Most likely first
- Faulty charge air cooler cooling fan
- Malfunctioning cooling fan control module
- Damaged or disconnected wiring in the cooling fan circuit
- Faulty engine coolant temperature sensor
- Defective powertrain control module (PCM)
How to diagnose & fix
Work through it in order
- Engine overheating
- Poor air conditioning performance
- Loss of power or hesitation during acceleration
- Illuminated check engine light
- Loud fan noise
Read & clear P028B yourself
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