P2852 OBD Error Code: Problem & Solutions

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The trouble code P2852 can be explained as Shift Fork Position Sensor "C"/"D" Correlation. This diagnostic fault code is a generic powertrain code, which means that it would apply to the OBD-II equipped vehicles. The specific repair steps can vary as it depends upon the vehicle make and model. Two electric motors are utilized to shift the gears in the transmission, for gears 1-3-5 and one for gears R-2-4-6. The gear shifting are built by two shift drums which are connected to shift motor pinion via two ideal gears. The topmost shift force is 1500N (337 lb.). The motors are non-segregated in the transmission control module (TCM) and work separately of each other. One thing which you must keep in mind that its symptoms as well as causes would surely vary as it depends upon a number of things.

The specifications on the definition, the troubleshooting steps as well as repairs can always vary from one vehicle to another. It is the transmission which converts the power produced by the car engine to movement of the automobile. There are some transmissions which use the electric motors to change gears. Now if the transmission control module would decide that the transmission is not shifting in the right manner, then the P2852 error code would start appearing. This can happen because of a lot of reasons and the mechanic should diagnose the specific cause for this code.

What causes this problem with the Shift Fork Position Sensor "C"/"D" Correlation?

• Out of fashion transmission control module (TCM) program
• Quirks in the transmission control module (TCM)
• There can be inoperative transmission assembly

1. Engine Control Module - ECM faults are rare but can be a big problem as faulty ECM will cause wrong vehicle operations and can also result in wrong OBD codes getting stored in the system which can also cause misdiagnosis. Thus, replace faulty ECM components now!
2. Automatic Transmission Module - A defective transmission module will affect the gear shift mechanism and also affect during acceleration and deceleration. This will lead to affected engine performance and fuel delivery system. Thus, replace faulty transmission module now!
3. Electronic Control Unit - The ECU coordinates with the temperature sensor to control the blower fan for keeping the battery temperatures under control. So, replace faulty ECU components now!
4. Powertrain Control Module - Check for PCM error which might be due to circuit faults that might require complete replacement and reprogramming. Replace it now!
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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 P2852 here:

Common Symptoms

• Appearance of the service engine soon light
• Issues in transmission shifting
• Rising fuel consumption
  

Looking out for some ways with the help of which you can correct this fault code? Then you have arrived at the correct place. We are here to help you out, so you must check out the steps mentioned below as follows:

• Make sure to mend the faulty transmission control module
• It is essential to restore the flawed PCM/ECM
• Repair or replace the quirky transmission assembly 

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

• As an initial step the mechanic will carefully inspect the vehicle with the help of a scanner.
• After this, the technician will connect a scanner to the diagnostic code so that he can recover all the codes and freeze frame data.
• Note down this information as it can clearly help for further diagnosis.
• After careful inspection, he will reset the code and test drive your vehicle to check for reappearance of the codes.
• He will know that an intermittent condition persist, if the code does not return instantly.
• But if the error code returns quickly, the vehicle is test driven, and then he has to inspect the transmission fluid.
• If any of the shift fork position sensor "C"/"D" is damaged, the mechanic will replace them quickly.
• Most often, whenever the mechanic carries out any repair work, he will reset the code and test drive your car, to check if the codes return immediately. This can preferably help the mechanic to know what caused this error code in the vehicle.

Common Mistakes When Diagnosing The P2852 Code

• Non Performance of the transmission control module
• There might be a need to calibrate the transmission control module (TCM)
• Transmission control module (TCM) software requires to be updated
• Failure in the internal transmission
• Issues related to the wiring