OBD-II code · Powertrain (generic, extended)
P246B Vehicle Conditions Incorrect for Particulate Filter Regeneration
The driving pattern (short trips, low speed, frequent stops) does not provide the load and EGT needed for passive or active DPF regeneration. Filter loading rises until limit reached.
Is it safe to drive with P246B?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyShort-trip operation
Symptoms
- Check engine light or DPF warning light on
- Power loss / limp mode
- Increased fuel consumption
- Failed forced regeneration attempts
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0–1 h
- Emissions test
- Likely to fail
- Parts involved
- Dpf B1
Related codes
- P2468Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 3
- P2469Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 3
- P246AExhaust Gas Temperature Sensor Circuit Intermittent or Erratic Bank 2 Sensor 3
- P246CParticulate Filter Restriction Forced Limited Power Bank 1
- P246DParticulate Filter Pressure Sensor A and B Correlation
- P246EExhaust Gas Temperature Sensor Circuit Bank 1 Sensor 4
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.