Exhaust Temperature Too Low for DPF Regeneration (Bank 1)
The P244C code indicates that the exhaust gas temperature (EGT) sensor on Bank 1 is reading too low for the diesel particulate filter (DPF) regeneration process to occur. This prevents the DPF from burning off accumulated soot, leading to potential clogging. The issue may stem from a faulty EGT sensor, wiring problems, exhaust leaks, or insufficient engine load to raise exhaust temperatures.
01. Most Common Causes
- Faulty exhaust gas temperature sensor (Bank 1)
- Wiring or connector issues in the EGT sensor circuit
- Exhaust leaks upstream of the DPF
- Engine not reaching operating temperature (short trips, faulty thermostat)
- DPF regeneration system malfunction
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel economy
- Loss of engine power
- DPF warning light on dashboard
- Possible limp mode activation
03. Step-by-Step Diagnosis
Step 1: Scan for codes and verify P244C is present. Check for additional related codes.
Step 2: Inspect the EGT sensor and its wiring for damage, corrosion, or loose connections.
Step 3: Compare EGT sensor readings with a scan tool to manufacturer specifications; test sensor resistance if needed.
Step 4: Check for exhaust leaks using a smoke machine or visual inspection.
Step 5: Perform a forced DPF regeneration using a scan tool and monitor exhaust temperatures.
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 the DPF may clog, leading to expensive repairs. Short trips to a repair shop are acceptable.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and sensor replacement, but can be higher if the DPF needs cleaning or replacement.