Exhaust Temperature Too High for DPF Regeneration Bank 1
The P244D code indicates that the exhaust gas temperature (EGT) sensor on Bank 1 is reporting temperatures too high for the diesel particulate filter (DPF) regeneration process. This can prevent proper regeneration, leading to DPF clogging and reduced engine performance. The issue often stems from a faulty EGT sensor, wiring problems, or an exhaust leak causing inaccurate readings.
01. Most Common Causes
- Faulty exhaust gas temperature sensor
- Damaged wiring or connector to EGT sensor
- Exhaust leak before the DPF
- Engine misfire or rich fuel mixture causing high exhaust temps
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel economy
- Loss of engine power
- DPF regeneration frequency changes or fails
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Inspect EGT sensor wiring and connector for damage or corrosion.
Step 3: Test EGT sensor resistance and compare to specifications.
Step 4: Check for exhaust leaks upstream of the DPF.
Step 5: Monitor live data for EGT sensor readings during a test drive.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as high exhaust temps can damage the DPF and catalytic converter. Short trips to a repair shop are acceptable.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for a DIY sensor replacement, or $200 to $400 at a shop including labor and diagnostics.