P244FExhaust Temperature Too High For Particulate Filter Regeneration (Bank 2)
- 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
- The bank 2 counterpart of P244D: during a filter burn the second bank's exhaust gets hotter than the substrate tolerates. No manufacturer documents P244F publicly. The bank 1 version appears in GM's 2011 Duramax tables as a catalyst overtemperature during regeneration, and Ram links P244D on current Cummins trucks to exhaust temperature sensor faults, so a wrong sensor reading deserves suspicion before the hardware. On a real overheat the usual trigger is surplus fuel on that bank, from a dripping injector or a filter that was allowed to load up far too much before the burn started. The controller ends the regeneration, may reduce power and will retry later. Because overheating can crack the filter, a code that keeps returning should be diagnosed rather than repeatedly cleared. Too little heat on bank 2 is P244E.
- What you may notice
- Malfunction indicator lamp on
- Regeneration stopped, possibly reduced power
- Likely causes
- LikelySurplus fuel on bank 2 from a leaking injector
- PossibleBank 2 exhaust temperature sensor or wiring reading too high
- PossibleBank 2 filter heavily overloaded before the burn
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €3,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.