OBD-II code · Powertrain (generic, extended)
P25BD Unmetered Fuel - Forced Engine Shutdown
The engine controller commanded a forced shutdown after detecting unmetered fuel reaching the combustion chambers. Common on diesels with leaking turbo seals or cracked intercoolers that drip oil into the intake — the engine then runs on the oil and can overspeed.
Is it safe to drive with P25BD?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyTurbocharger oil seal leak feeds engine oil into the intake
- PossibleOil collected in the intercooler is sucked into the engine on load
- PossibleFailed PCV / crankcase breather floods intake with oil mist
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 3–10 h
- Emissions test
- Usually unaffected
- Parts involved
- Turbocharger Seals, Intercooler, Intake Manifold, Air Shutoff Valve
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.