Exhaust Temperature Too Low For Particulate Filter Regeneration Bank 2
What it means
P244E means the exhaust on bank 2 is not getting hot enough to burn off the soot stored in the diesel particulate filter, so regeneration cannot complete. It is often a low-reading or faulty exhaust gas temperature (EGT) sensor, but genuinely cool exhaust — from short trips, a stuck-open EGR, or an engine not reaching full temperature — can also cause it. The car usually still drives, but a filter that cannot regenerate will clog over time.
Can I keep driving? Usually yes for now, but if the filter cannot regenerate it will keep loading with soot and can eventually force reduced power or limp mode — address it soon.
Common symptoms
What you'll notice
- Check-engine light on, sometimes with a DPF or exhaust-service warning
- Frequent or failed/interrupted regeneration attempts
- Gradually reduced power if the filter loads with soot
- Slightly higher fuel use during repeated regen attempts
Common causes
Most likely first
- Exhaust gas temperature (EGT) sensor reading low or faulty on bank 2Likely
- Open, shorted, or corroded wiring or connector at the EGT sensorCommon
- Genuinely low exhaust temperature from lots of short, low-load tripsCommon
- EGR stuck open, cooling the exhaust below regeneration temperatureLess often
- Coolant/thermostat or injection/dosing fault keeping exhaust temps downLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and compare the bank 2 EGT sensor reading against the others for a stuck-low value.
- Inspect the EGT sensor connector and wiring for damage or corrosion.
- Check for an EGR valve stuck open and confirm the thermostat brings the engine to full temperature.
- If sensors and temperatures are correct, drive at sustained highway speed to allow a regeneration, or run a forced regen with a capable tool.
- Replace a faulty EGT sensor if confirmed, then clear the code and re-test.
FAQ
Quick answers
Is it safe to drive with P244E?+
Can I just clear P244E?+
Related codes
Often seen with P244E
Read & clear P244E yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.