OBD-II code · Powertrain (generic, extended)
P253F Engine Oil Deteriorated
The oil quality monitor concludes that the engine oil has reached the end of its useful life — based on permittivity, soot content, fuel dilution and total operating hours. The ECM requests an oil change before the next regen cycle to prevent accelerated bearing wear.
Is it safe to drive with P253F?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyService interval exceeded
- PossibleHigh DPF regeneration load with fuel dilution
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1 h
- Emissions test
- Usually unaffected
- Parts involved
- Engine Oil
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.