Fault code P244E – exhaust temperature too low for particulate filter regeneration (Bank 2)

Fault code P244E is called “Exhaust Temperature Too Low For Particulate Filter Regeneration (Bank 2)” but in different programs it may be called differently. This fault designation applies to all vehicles equipped with OBD-II.

Technical description and explained code P244E

Fault code P244E is a generic code defined as “Exhaust temperature too low for particulate filter regeneration (Bank 2)”. It is set on vehicles with diesel engines.

Fault code P244E – exhaust temperature too low for particulate filter regeneration (Bank 2)

The diesel particulate filter (DPF) is designed to remove ninety percent of the carbon particles (soot) from the exhaust gases of diesel engines. It is located before the catalytic converter or NOx trap.

When engine exhaust passes through the particulate filter, large particles are trapped between the fibers. As soot accumulates, the pressure of the exhaust increases.

After a sufficient amount of soot has accumulated and the exhaust gas pressure has reached the programmed degree. The filter element must be regenerated to allow the exhaust gases to continue to pass through the DPF.

A special diesel engine fluid is used to convert the remaining exhaust particles to non-toxic exhaust particles. In addition, an elevated temperature is required for complete combustion of the particles in the exhaust system.

Only then is the system able to convert NOx into nitrogen, carbon dioxide and water. To further reduce NOx in the exhaust system, a reductant catalyst (SRC) is added.

The filter must go into regeneration mode for self-cleaning. This only occurs after certain conditions have been set. Code P244E is set by the control module when the filter is full and the required conditions are not met. In this case the temperature for regeneration is too low.

When this error occurs, the vehicle sometimes goes into emergency mode, thereby limiting engine power and travel speed.

Symptoms of vehicle malfunctions

The main signal that an error P244E has occurred is the Malfunction Indicator Lamp (MIL) is also known as the CheckEngine Light.

It can also be warning signs such as:

  1. The “Check engine” control lamp on the control panel will illuminate (the code will be stored as a fault).
  2. The particulate filter control lamp may illuminate.
  3. Engine output may drop.
  4. Excessive amount of soot emitted with the car exhaust gases.

Error P244E is not considered very serious, but if the problem is not solved for a long time, the engine control module (ECM) may put the car into emergency mode. This will cause the vehicle speed to be limited and engine power to drop.

Factors that can cause this error code

The error code P244E can mean that one or more of the following problems have occurred:

  • Diesel particulate filter malfunction.
  • DPF temperature sensor is defective.
  • Open or short circuit in DPF temperature sensor circuit.
  • Use of fuel with high sulfur content.
  • Contaminated air filter element.
  • Exhaust gas leakage.
  • Incorrect ECM strategy prevents proper regeneration.
  • Sometimes the cause is a faulty ECM module.

How to fix or reset OBD-2 code P244E

Some suggested steps for troubleshooting and fix the error code P244E:

  1. Connect the OBD-II scanner to the vehicle’s diagnostic connector and read all stored data and error codes.
  2. Clear the error codes from the computer memory.
  3. Test-drive the vehicle to see if the P244E error appears again.
  4. If the code appears again, visually inspect the electrical wires and connectors.
  5. Check the particulate filter as well as the particulate filter temperature sensor.
  6. Repair or replace any damaged or defective components.
  7. Test and replace the Engine Control Module (ECM) if necessary.

Diagnose and repair of problems

It is better to start troubleshooting the P244E error with a visual inspection of the relevant harnesses and connectors. You should pay special attention to the wiring near the hot exhaust components and sharp edges.

The DPF temperature sensor should then be checked with a multimeter. If the sensor does not meet the manufacturer’s resistance requirements, it should be replaced.

If the sensor is OK, check the hoses for blockages or breaks and clean or replace if necessary. High temperature silicone hoses should be used for replacement.

After testing the sensor and inspecting the hoses, check the electrical circuitry of the system. Disconnect all associated control modules before checking resistance with a multimeter. If necessary, repair or replace damaged or shorted circuits.

By following all recommendations, the P244E error will most likely be corrected and will go away. If it does not, the problem may be a faulty engine control module (ECM).

On which vehicles does this problem occur most frequently

Fault code P244E can occur on different vehicles but there are statistics on which brands this occurs most often. Here is a list of some of them:

  • Toyota

Fault code P244E can sometimes be found with other errors. The most common are the following: P244A, P244B, P244C, P244D, P244F.

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