What it means
During particulate-filter regeneration, exhaust temperature on Bank 2 is below the calibrated range. The code does not establish why the temperature is low or prescribe a driving action.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
How it works
The DPF traps soot, and regeneration heats the exhaust so the soot can burn away. The engine control module monitors Bank 2 exhaust temperature during regeneration; P244E sets when that temperature stays below its calibrated range.
Common causes
Most likely first.
- Frequent short trips or low engine load during regeneration
- Exhaust leak reducing temperature
- Faulty exhaust temperature sensor or wiring
- Engine or fuel-system fault affecting exhaust heat
Symptoms
- Check engine light or DPF warning light on
- Power loss / limp mode
- Increased fuel consumption
- Failed forced regeneration attempts
How to diagnose it
- Review freeze-frame data and regeneration status to see whether Bank 2 was under low load or the vehicle was making frequent short trips.
- Compare live Bank 2 exhaust temperature readings with other exhaust temperature sensors to identify a cold reading or an implausible sensor difference.
- Inspect the Bank 2 exhaust temperature sensor, connector, and wiring for damage, corrosion, or loose connections.
- Look for exhaust leaks around the Bank 2 sensor and DPF, since leaks can reduce measured temperature.
- If temperature sensing and exhaust integrity check out, investigate engine and fuel-system faults that could prevent the exhaust from warming as expected.
Common fixes
- Repair damaged or leaking Bank 2 exhaust joints.
- Repair a loose, corroded, or damaged sensor connection or wiring.
- Replace a faulty Bank 2 exhaust temperature sensor.
- Repair the engine or fuel-system fault preventing adequate exhaust heat.
Can I keep driving?
Arrange diagnosis soon and avoid repeated forced regeneration attempts until the low Bank 2 temperature reading is understood. If regeneration keeps failing, soot can accumulate, fuel use may rise, and the vehicle may lose power.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.