P028D
Charge Air Cooler Cooling Fan Control Circuit Low
Generic OBD-II
Common symptoms
What you'll notice
- Inspect and repair any damaged or loose wiring connections related to the charge air cooler cooling fan control circuit
- Replace the charge air cooler cooling fan if it is malfunctioning or not working properly
- Check and clean the charge air cooler for any obstructions or blockages that may be causing low cooling efficiency
- Verify the operation of the charge air cooler cooling fan control module and replace if necessary
Common causes
Most likely first
- Faulty charge air cooler cooling fan
- Wiring issue or short circuit in the charge air cooler cooling fan control circuit
- Malfunctioning charge air cooler cooling fan control module
- Low voltage supply to the charge air cooler cooling fan control circuit
- Faulty engine control module (ECM) affecting the charge air cooler cooling fan control circuit
How to diagnose & fix
Work through it in order
- Engine overheating
- Lack of power or decreased acceleration
- Dashboard warning light illuminated (such as check engine light)
- Poor fuel efficiency
- Difficulty starting the vehicle
Read & clear P028D yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.