OBD-II code · Powertrain (generic, extended)
P2458 DPF Regeneration Duration
The DPF regeneration cycle takes longer than the calibrated maximum. The ECU sets this code when the soot load is not being burned off within the expected window — common after many short trips or with degraded post-injection.
Is it safe to drive with P2458?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyHeavy soot load, short trips
- PossiblePost-injection insufficient
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
- 0.5–4 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Diesel Particulate Filter, Dpf Temperature Sensor, Fuel Injectors
Related codes
- P2455Diesel Particulate Filter Pressure Sensor Circuit High
- P2456DPF Differential Pressure Sensor Circuit Intermittent
- P2457EGR Cooler Performance
- P2459Diesel Particulate Filter Regeneration Frequency
- P245AEGR Cooler Bypass Control Circuit Open Bank 1
- P245BEGR Cooler Bypass Control Circuit Range or Performance Bank 1
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.