OBD-II code · Powertrain (generic)
P028B Charge Air Cooler Cooling Fan Performance/Stuck Off
CAC cooling fan does not run when commanded.
Is it safe to drive with P028B?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyFan motor seized
- Less likelyCarbon or debris buildup preventing free movement
- Less likelyComponent wear with age - mechanical play
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–4 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Cac Cooling Fan
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.