Powertrain, generic (extended)

P244F Exhaust Temperature Too High For Particulate Filter Regeneration (Bank 2)

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

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.

Likely causes

Surplus fuel on bank 2 from a leaking injector
Bank 2 exhaust temperature sensor or wiring reading too high
Bank 2 filter heavily overloaded before the burn

Symptoms

  • Malfunction indicator lamp on
  • Regeneration stopped, possibly reduced power

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–3,000
Time0.5–5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

dpf b2

Related codes

P244DP244E

References: law.cornell.edu, gsi.ext.gm.com, static.nhtsa.gov.