Powertrain
generic / SAE
P028D
Charge Air Cooler Cooling Fan Control Circuit Low
CAC cooling fan control voltage below expected range. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number2 / 8D
Possible causes
- Wiring shorted to ground high
- Connector pins corroded - high contact resistance low
- Harness chafing through insulation low
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 60–400 €
- Estimated time: 0.5–2 h
- Component: cac cooling fan
- Component: fan wiring
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012