P244CExhaust Temperature Too Low For Particulate Filter Regeneration (Bank 1)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- During an active regeneration the engine raises exhaust temperature with late injections so the soot in the particulate filter can burn. P244C is stored when bank 1 does not get hot enough or does not stay hot long enough. GM's diesel tables of 2017 and 2018 count interrupted regenerations: the burn ran past its maximum time, the post injections were not released in time or the steady heating phase was never reached; a successful burn clears the counter, and the code is Type A after one trip. VW's 2014 TDI cars flag it when closed-loop temperature control upstream of the turbine is not active within 45 s, or ahead of the filter within 60 s. Deutz lists it as a failed regeneration. The bank 2 twin is P244E; P244D covers too much heat. Soot keeps building, so P2463 or P2459 may follow.
- What you may notice
- Malfunction indicator lamp and particulate filter warning on
- Regenerations noticeably frequent or never finishing
- Reduced power once the filter is heavily loaded
- Likely causes
- LikelyOxidation catalyst aged or face-plugged, so the post-injected fuel does not light off
- LikelyRegenerations repeatedly cut short by short trips, idling or engine shut-off
- PossibleExhaust temperature sensor ahead of catalyst or filter reading too low
- RareExhaust leak ahead of the catalyst cooling the gas
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €1,800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.