P244C
Exhaust Temperature Too Low For Particulate Filter Regeneration Bank 1
Diesel particulate filter (DPF)
Generic OBD-II
Medium
What it means
P244C means exhaust temperature on bank 1 is too low for the diesel particulate filter (DPF) to regenerate — the high-heat cycle that burns trapped soot out of the filter. Without hot enough exhaust the DPF keeps loading with soot. It's often a faulty exhaust temperature sensor or a lot of short-trip driving, and if ignored the filter can clog, forcing the engine into reduced-power limp mode.
Medium
Can I keep driving? Usually yes for now, but the DPF can't burn off its soot, so it will keep loading up — address it before the filter clogs and forces limp mode.
Common symptoms
What you'll notice
- Check-engine light on
- Reduced power or limp mode as the DPF fills with soot
- Frequent or incomplete regeneration cycles
- Possible drop in fuel economy
Common causes
Most likely first
- Exhaust gas temperature (EGT) sensor reading low or faultyLikely
- Lots of short-trip / low-load driving that never lets exhaust get hot enough to regenerateCommon
- EGT sensor wiring or connector faultCommon
- Engine running too cold (e.g. stuck-open thermostat)Less often
- Fuel injection or regeneration-system fault reducing exhaust temperatureLess often
How to diagnose & fix
Work through it in order
- Scan and compare the EGT sensor reading against actual exhaust temperature.
- Take the vehicle on a sustained highway drive to allow a full regeneration.
- Inspect and replace the EGT sensor if it reads low; check its wiring and connector.
- Verify the engine reaches normal operating temperature (check the thermostat).
- If needed, command a forced regeneration with a capable scan tool and address the root cause.
FAQ
Quick answers
Is it safe to drive with P244C?+
Short term, yes — but the diesel particulate filter can't burn off its trapped soot, so it keeps loading. Left alone it can clog, trigger limp mode, and require an expensive DPF cleaning or replacement.
Can I just clear P244C?+
Clearing it doesn't lower the soot load. Fix the EGT sensor or driving pattern, then let the vehicle complete a regeneration; otherwise it returns.
Related codes
Often seen with P244C
Read & clear P244C yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX