OBD-II code · Powertrain (generic, extended)
P249F Excessive Time To Enter Closed Loop Particulate Filter Regeneration Control
The DPF regeneration controller cannot transition into its closed-loop temperature control quickly enough - typically because EGT does not rise to setpoint within the calibrated window.
Is it safe to drive with P249F?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyEGT rise too slow
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
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Likely to fail
- Parts involved
- Dpf B1, Exhaust Gas Temperature Sensor B1
Related codes
- P249CExcessive Time To Enter Closed Loop Reductant Injection Control
- P249DClosed Loop Reductant Injection Control At Limit Flow Too Low
- P249EClosed Loop Reductant Injection Control At Limit Flow Too High
- P24A0Closed Loop Particulate Filter Regeneration Control At Limit Temperature Too Low
- P24A1Closed Loop Particulate Filter Regeneration Control At Limit Temperature Too High
- P24A2Particulate Filter Regeneration Incomplete Bank 1
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.