Exhaust Temperature Too High for DPF Regeneration Bank 2
The P244F code indicates that the exhaust gas temperature (EGT) sensor on Bank 2 is reporting excessively high temperatures, preventing the diesel particulate filter (DPF) from performing regeneration. This can be caused by a faulty EGT sensor, a clogged DPF, or issues with the regeneration system such as insufficient fuel injection or exhaust leaks. High exhaust temperatures can damage the DPF and other exhaust components if not addressed promptly.
1. Most Common Causes
- Faulty exhaust gas temperature (EGT) sensor on Bank 2
- Clogged or restricted diesel particulate filter (DPF)
- Exhaust system leaks before the DPF
- Incorrect fuel injection timing or quantity during regeneration
- Malfunctioning diesel oxidation catalyst (DOC)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine performance and fuel economy
- DPF regeneration frequency increased or unable to complete
- Excessive exhaust smoke or odor
- Possible limp mode activation
3. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for related codes (e.g., P244A, P244B).
Step 2: Inspect the EGT sensor on Bank 2 for damage, corrosion, or loose wiring; compare readings with Bank 1 sensor using a scan tool.
Step 3: Check the DPF pressure sensor readings to determine if the filter is clogged; perform a forced regeneration if safe.
Step 4: Inspect the exhaust system for leaks, especially before the DPF, and repair as needed.
Step 5: Test the fuel injection system and DOC functionality if other causes are ruled out.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances with this code, as high exhaust temperatures can damage the DPF and other components. Short trips to a repair shop are acceptable, but avoid heavy loads or prolonged driving.
How much does it cost to fix?▼
The cost to diagnose and repair P244F typically ranges from $50 to $150 for a sensor replacement, but can be higher if the DPF needs cleaning or replacement.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.