P244EExhaust Temperature Too Low 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
- P244E only exists on engines that have a separate particulate filter for the second cylinder bank, which is rare. No manufacturer documents this code publicly; it mirrors P244C, so the logic described for bank 1 applies here. GM, for example, counts regenerations on its 2017 diesels that end early because the heat-up never reached a stable phase, and gives that bank 1 fault a Type A rating. CARB requires diesel systems to detect a regeneration that fails to complete. On a two-filter layout the second bank lacks heat when its oxidation catalyst no longer converts the fuel, its exhaust temperature sensor reads low or the gas cools through a leak. Comparing both banks during a forced regeneration with a scan tool is the most direct check. Overheating of bank 2 is P244F.
- What you may notice
- Malfunction indicator lamp on
- Filter warning, regeneration does not complete
- Likely causes
- LikelyBank 2 oxidation catalyst no longer converting post-injected fuel
- PossibleBank 2 exhaust temperature sensor reading low
- PossibleDriving pattern too short for a complete regeneration
- RareExhaust leak on bank 2 ahead of the catalyst
- 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.