P244C

Exhaust Temperature Too Low For Particulate Filter Regeneration Bank 1

Q: 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.

Q: 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.

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.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

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.

Read & clear P244C yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX