The P244C: Exhaust Temperature Too Low For Particulate Filter Regeneration Bank 1 code indicates that the exhaust temperature is not reaching the required level to initiate or complete particulate filter regeneration in Bank 1. This can be due to a faulty temperature sensor, problems in the exhaust system, or issues with the exhaust heater, all of which prevent proper filter regeneration.
P244C – Quick Overview
Code | Information |
---|---|
Meaning | P244C: Exhaust Temperature Too Low For Particulate Filter Regeneration Bank 1 |
Is it serious? | Moderate – without proper regeneration, the diesel particulate filter can become clogged, leading to reduced engine performance and potential damage to the exhaust system. |
Possible causes | – Exhaust temperature too low to initiate regeneration for Bank 1 – Faulty temperature sensor – Issues with the exhaust system or heater |
How to diagnose? | – Inspect and test the exhaust temperature sensor for Bank 1 – Check the exhaust system and heater – Replace faulty sensor or components as needed |
P244C Meaning
The P244C: Exhaust Temperature Too Low For Particulate Filter Regeneration Bank 1 code signifies that the exhaust temperature is too low for effective particulate filter regeneration to occur in Bank 1. Diesel particulate filters (DPF) require a high exhaust temperature to burn off the trapped soot, a process known as regeneration. If the temperature is too low, regeneration cannot occur, leading to potential filter clogging and reduced vehicle performance. Common causes include a faulty temperature sensor that provides incorrect readings, problems with the exhaust heater, or other exhaust-related issues.
Step-by-step diagnostic guide
Action | Description | Tools Needed |
---|---|---|
Check for Other Codes | Use an OBD-II scanner to determine if there are other related fault codes. Related codes can help in diagnosing exhaust system or sensor issues. | OBD-II Scanner |
Inspect the Exhaust Temperature Sensor | Visually inspect the exhaust temperature sensor for Bank 1 for physical damage or wear. Ensure the sensor is properly connected and free of contaminants. | Flashlight, Safety Gloves |
Test the Temperature Sensor | Use a diagnostic tool to measure the output from the exhaust temperature sensor. Compare readings to manufacturer specifications to ensure it is providing accurate temperatures. | Multimeter, Diagnostic Tool |
Check the Exhaust Heater | If equipped, inspect the exhaust heater for proper function. Make sure it is providing sufficient heat to allow DPF regeneration to occur when necessary. | Diagnostic Tool, Multimeter |
Inspect the Exhaust System | Inspect the exhaust system for any restrictions, leaks, or damage that could prevent the exhaust temperature from reaching the required level. | Flashlight |
Repair or Replace Components | If the temperature sensor, exhaust heater, or any other exhaust component is found to be faulty, replace or repair as necessary to ensure proper regeneration can occur. | Replacement Sensor, Heater, Wrench Set |
Clear the Code and Test Drive | Clear the P244C code using an OBD-II scanner, then take the vehicle for a test drive to verify that exhaust temperatures are reaching the required level for DPF regeneration. | OBD-II Scanner, Vehicle Owner’s Manual |
Recheck for Codes | Re-scan the vehicle after the test drive to confirm that the P244C code has not returned. If it persists, further diagnostics are necessary to address the root issue. | OBD-II Scanner |

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