Error Code P074D: What It Means & What To Do?

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OBD error code P074D flashing? Tensed on how bad it can affect your vehicle’s health? Well, you might not like to hear it but it can be extremely fatal for your vehicle’s transmission health. If you face this error code then you must not drive your vehicle to avoid any mis happening until it is fixed. To know more about this problem, read through our following sections.

Remember that your vehicle’s transmission system performs the function of converting the power that your engine produces to the movement of your vehicle. For ensuring its smooth functioning it has its own module known as transmission control module (TCM) which uses the solenoids to manage the fluid pressure that activates the different gears of your transmission of your system. Transmission control module of your vehicle will set this error code when it detects that the automatic transmission is failing to engage gear 5.

What causes this problem with the Unable To Engage Gear 5?

• Clogged transmission hydraulics
• Issues with the automatic transmission fluid such as being incorrect or low
• Issues with the shift solenoid
• Programming errors with the powertrain control module
• Problematic transmission control module (TCM)
• Leaking air front of the DPF causing the wrong sensor reading

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Willing to know some common symptoms of OBD Code P074D? Your wish is our demand. Have a look at them below:

Common Symptoms

• Misfiring engine
• Restricted speed of the vehicle
• Fall in fuel efficiency
• Problems with the speed of the vehicle
• Failing transmission
• Malfunctioning spark plug and knock sensor
• Fall in the engine performance

We have listed out some ways which would help you to correct the occurrence of OBD Code P074D. They are mentioned here as follows:

• Repair or replace automatic transmission fluid or filter, whichever is at fault
• Repair or replace the dirty & clogged DPF
• Repair or replace faulty DPF and related harnesses and parts
• Repair or replace faulty transmission control module
• Repair or replace the damaged fuel level sensor
• Repair or replace spark plugs and knock sensors if found faulty

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Here are some steps which you should follow in order to diagnose this fault code:

In order to diagnose the error code P074D, you will need to check for the automatic transmission fluid integrity. Make use of a dipstick to check the automatic transmission fluid level, while its running and while it’s in park.

Keep in mind that the procedure to do so will vary greatly from manufacturer to manufacturer. You can definitely make use of the service manual present in your car’s dash. Next, check for any debris or dirt in the fluid. Before proceeding further, you will need to make sure its is free of all this as a dirty ATF can adversely affect the operation of your transmission. Now, in case you discover any leaks and witness low fluid level then we recommend you to check for any signs of oil stains or puddles in your driveway.

Also, inspect your vehicle’s transmission control modules for any potential issues. Also check for any signs of water intrusion. Also look for any signs of corrosion on housings or connectors. If you do not find any issue with the above stated steps then consider monitoring your gear position and its functionality. While doing so you will be able to tell of the transmission is shifting or not by its drivability. In case it is floored and accelerated too slow then it is probably stuck a high gear - 4, 5, 6 or 7. In case it is accelerating too fast then it is stuck at a lower gear - 1, 2 or 3.

Common Mistakes When Diagnosing the P074D Code

If you want to avoid any misdiagnosis, take care of the following failures

• Failing internal transmission
• Failing TCM
• Low transmission fluid
• Failing transmission solenoid
• Issues with the wiring system