P244E code meaning
Exhaust Temperature Too Low For Particulate Filter Regeneration (Bank 2)
Powertrain system Generic code P24xx codes Check engine light
What P244E means
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.
P244E at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 4 hours
- Clears after repairAfter a drive cycle
Symptoms of P244E
- Malfunction indicator lamp on
- Filter warning, regeneration does not complete
Common causes of P244E
- Most 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
- Less likelyExhaust leak on bank 2 ahead of the catalyst
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
DPF b2
What each part of P244E means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 4 | Area: auxiliary emission controls (catalytic converter, EGR, EVAP). |
| 4E | The exact fault in that area. |
What to do next
- Note P244E and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P244E
What does P244E mean?
P244E means "Exhaust Temperature Too Low For Particulate Filter Regeneration (Bank 2)". P244E only exists on engines that have a separate particulate filter for the second cylinder bank, which is rare. It is a generic code, so it means the same on every make.
Is it safe to drive with P244E?
Drive gently and only to a workshop. With P244E the car can go into limp mode (reduced power) to protect itself.
Will P244E fail an emissions test?
Yes, it can. P244E is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P244E to fix?
Difficulty: medium. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P244E clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.