Guide To P246D OBD Error Code Solutions

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Check engine light illuminated? Baffled? Don’t know where to start form? Don’t worry! Here’s all that you need to know about the error code P246D. This OBD-II code powertrain control module (PCM) failure in technical terms is also known as a diesel particulate filter pressure sensor "A"/"B" correlation. The diesel exhaust fluid (DEF) is utilized by the system to aid while converting the surplus exhaust particles to nontoxic gases. Well, to completely burn off those particles, an increased temperature is mandatory in the exhaust system. It should be noted that an injection of DEF fluid is required into the exhaust stream in order to attain the optimum temperature diesel particulate filter (DPF). Then the system is able to alter the hazardous NOx to nitrogen, carbon dioxide and water. Further, in order to reduce any NOx present in the exhaust stream, the reductant catalyst (SRC) is added. The pressure going in and coming out of the diesel particulate filter (DPF) is calculated by the exhaust pressure sensor. When an impractical signal is detected by the engine computer (PCM) from one of the pressure sensors, the code P246D is stored.

During the idle and part load operating conditions, the powertrain control module (PCM) monitors the rationality of the diesel particulate filter (DPF) pressure sensor. When the signal value at idle is less than 0.15 kPa (0.022 psi) of the diesel particulate filter pressure sensor, the test is likely to fail. Also, the test is likely to fail when the signal value of the diesel particulate filter pressure sensor signal at part load is less than a minimum value or greater than a maximum value. These maximum and minimum values are derived on the basis of the volume of the exhaust.

What causes this problem with the Diesel Particulate Filter Pressure Sensor ''A''/''B'' Correlation?

• A fault in the diesel particulate filter pressure sensor
• Corroded or loose diesel particulate filter pressure sensor harness
• A bad electrical connection in the diesel particulate filter pressure sensor circuit

1. Diesel Particulate Filter - A polluted or clogged diesel particulate filter can cause a lot of problems like potential damage to components, including DEF dosing pump and diesel particulate filter and malfunctions with the machine’s SCR system. Parts Avatar is just the right place that provides superior quality diesel exhaust fluid pump across the country.
2. Exhaust Pressure Sensor - Check engine light flashing? Soot building up? Engine performance issues? All this is most probably triggered due to a damaged exhaust pressure sensor. Log into Parts Avatar now!
3. Powertrain Control Module - Do you have any idea about the degree to which a faulty powertrain control module can harm your system? A faulty powertrain control module brings along issues like a fault in the functioning of the entire engine, also the sparks and ignition timing from the spark plugs are controlled and received by the PCM. Tune into Parts Avatar if you want to get your error code fixed.

It is vital to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P246D here:

Common Symptoms

• The engine light flashing (or service engine soon warning light)

Want to correct the trouble code P246D? Read these points mentioned below:

• Repair or replace a damaged diesel particulate filter pressure sensor
• Make sure you perform repairs to fix a poor electrical connection in the diesel particulate filter pressure sensor circuit
• All the corroded or loose diesel particulate filter pressure sensor harness

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Here we have listed how you can simply diagnose the error code P246D:

A scanner (or code reader) and a digital volt/ohmmeter will be helpful in precisely diagnosing this code-storing condition. Begin your diagnosis with a visual inspection of system wiring, connectors, and components. Repair or replace any open, shorted, damaged, or corroded items as required and retest the system to make sure that repairs were successful. If the system wiring, connectors, and components appear to be in conventional working order, connect the scanner to the diagnostic connector and record all stored trouble codes and freeze frame data. This information can be highly important in diagnosing intermittent conditions that may have stimulated the code being stored. After the codes are retested, operate the vehicle to see if the code returns. If the code fails to immediately return, you may have an intermittent condition.

Common Mistakes When Diagnosis the P246D Code

Here we have listed a few common mistakes that should be avoided while performing this procedure in order to avoid a major misdiagnose:

• A malfunction in the diesel particulate filter (DPF) pressure sensor
• A defect in the powertrain control module (PCM)
• Wiring problems