Powertrain
generic / SAE
P252F
Engine Oil Level Too High
The oil level monitor reports the engine oil level above the safe maximum after sensor checks pass. Overfilling raises foaming, blow-by and crankcase pressure — and on diesels with regen-by-injection, fuel dilution can drive the level up by itself. The ECM warns the driver and may flag for service.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / 2F
Possible causes
- Overfilled at last service high
- Fuel dilution from incomplete DPF regeneration medium
- Coolant intrusion (head gasket / cooler) low
Inspection / repair
- Difficulty: easy
- DIY: possible
- Estimated cost: 10–200 €
- Estimated time: 0.2–1 h
- Component: engine oil
- MIL / check engine light
Sources
References
sae:J2012