Exhaust Temperature Too High for DPF Regeneration Bank 2
The P244F code indicates that the exhaust gas temperature 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 temperature sensor, wiring issues, or an actual over-temperature condition due to excessive fuel in the exhaust or a clogged DPF. The powertrain control module (PCM) monitors exhaust temperature to initiate regeneration; if temperatures are too high, regeneration is aborted to avoid damage.
01. Most Common Causes
- Faulty exhaust gas temperature sensor Bank 2
- Wiring or connector issues to the sensor
- Excessive fuel in exhaust (e.g., leaking injector)
- Clogged or damaged DPF causing high backpressure
- PCM software or calibration error
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel economy
- Loss of engine power
- DPF regeneration not occurring or frequent regeneration attempts
- Possible black smoke from exhaust
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data. Check for additional codes related to exhaust temperature or DPF.
Step 2: Inspect the Bank 2 exhaust temperature sensor and its wiring for damage, corrosion, or loose connections.
Step 3: Compare sensor readings with a scan tool; Bank 2 temperature should be similar to Bank 1 under same conditions. If Bank 2 reads abnormally high, replace sensor.
Step 4: Check for exhaust leaks or restrictions (clogged DPF) that could cause high temperatures. Perform a DPF backpressure test if necessary.
Step 5: If sensor and wiring are okay, check for fuel system issues (e.g., leaking injector) causing excess fuel in exhaust. Perform a fuel injector leak-down test.
04. Commonly Affected Makes
05. 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 exhaust components. You may experience reduced performance and fuel economy. Have the issue diagnosed promptly.
How much does it cost to fix?▼
The cost to fix P244F typically ranges from $50 to $150 for a sensor replacement if that is the cause. However, if the DPF is clogged or there are other issues, costs can be higher (up to $1000 or more). Diagnosis is recommended first.