P0872 OBD Error Code: Problem & Solutions

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The trouble code P0872 can be defined as Transmission Fluid Pressure Sensor/Switch "C" Circuit Low. The mechanical transmission pressures are converted into an electrical signal by the TFPS for the powertrain control module or transmission control module. Generally, the other controllers utilizing the vehicle's data communication bus would then be informed by the PCM/TCM.

We learn more by looking for the answer to a question. That’s the reason why we are here to provide you the answers for all your questions. This trouble code is generic, which would mean that it can apply to all the vehicles which are equipped with the OBD-II or the vehicles which are made since 1996 up to the present. The specifications on the definition, the troubleshooting steps as well as repairs can always vary from one vehicle make to another. 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 Transmission Fluid Pressure Sensor/Switch "C" Circuit Low?

• There can be a short to ground in the signal circuit to the TFPS sensor
• There can be inoperative TFPS sensor
• Unusable PCM

1. Auto Transmission Valve Body Kit - The P0872 code can also arise due to some issues in Auto Transmission Valve Body Kit. So, it is advised to replace them as soon as possible.
2. Fuel Pressure Sensor - Do you remember when was the last time you got your car Fuel Pressure Sensor checked up? A damaged Fuel Pressure Sensor can cause a lot of issues like displaying P0872 code.
3. Auto Transmission Control Module - Auto Transmission Control Module is an important car part which should never be neglected. May be there is some fault in it due to which P0872 code may start flashing.
4. Powertrain Control Module - Is your Powertrain Control Module damaged or broken? Don’t worry as we have solutions for all your problems.
5. Body Control Module Component - Defective car Body Control Module Component can be a major reason why P0872 code depicts. So, make sure to replace it online so that you don’t have to face any further issues.
6. Oil Pressure Sender - Everything is okay with the Auto Transmission Control Module and still OBD code P0872 triggering? Then there must be some defects in Oil Pressure Sender. Replace them as soon as possible.
7. Auto Transmission Shift Solenoid - P0872 code flashing? Get your Auto Transmission Shift Solenoid inspected from a mechanic.
8. Electronic Control Unit - Electronic Control Unit is an important auto part. Take care of it and you can rely on us to purchase best quality Electronic Control Unit online.

Willing to know some common symptoms of OBD Trouble Code P0872? Your wish is our demand. Have a look at them below:

Common Symptoms

• Illumination in the service engine soon light
• The shift quality might start changing
• Automobile might start off in 2nd or 3rd gear 

If you wish to correct this fault code, then you have to follow certain steps. Correcting a problem needs your careful attention. Here are some ways with the help of which you will be able to correct the OBD Code P0872:

• You must fix the defective transmission
• Make sure to mend the faulty wiring, connectors, or components
• You can always install a brand-new torque converter
• It is essential to restore the flawed transmission temperature sensor
• Repair the leaks found in the transmission
• Rehabilitate the defaults in the fuses
• Carefully adjust the faults in the powertrain control module

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If you want to easily diagnose this fault code, then all you have to do is to follow the steps which are mentioned below:

• You should use a diagnostic scanner, a reliable source of vehicle information, and a digital volt/ohmmeter (DVOM) in order to arrive at an accurate diagnosis of a code P0872.
• Use the vehicle information source to search for applicable technical service bulletins (TSB).
• If you locate a TSB that matches the vehicle make and model, symptoms exhibited, and the code stored, it will help you to arrive at a diagnosis.
• Start the process of diagnosis with the power associated trouble code or with a number of code diagnosis.
• This might be the reason why P0872 error code is appearing.
• After that the transmission fluid pressure sensor/switch should be situated on your specific automobile.
• The TFPS is generally found attached to the side of the valve body inside the transmission.
• It can also be situated on the side of the transmission case.
• Once it has been located, then the connector as well as wiring should be visually located.
• You can always search for the wires which are bare, burned spots as well as plastic which has been melted.
• The connector should be pulled apart and the terminals which are inside the connector should be inspected properly.
• You must check if they are appearing burnt and if there is a green tint, then it would indicate that there is corrosion.
• This can happen if they are attached outside the case of the transmission.
• An electrical contact cleaner as well as plastic bristle brush should be used to clean the terminals as per the requirement.
• It should be allowed to dry properly and then electrical grease should be applied at the places where the terminals are in contact.
• By using a scan tool, all the diagnostic trouble codes should be cleared up from the memory.
• Then check if the P0872 code has returned or not.
• If you find out that it is not appearing again, then it would mean that there were some defects in the connections.
• Now if this error code returns, then you should definitely test the TFPS sensor as well as the related circuits.
• The electrical connector at the TFPS sensor should be disconnected with the key off.
• A digital voltmeter should be connected to the ground or low reference terminal at the TFPS sensor wiring harness connector.
• Then a read lead should be connected to the digital voltmeter.
• Then the key should be turned on and then engine should be off.
• You should carefully check the manufacturer's specifications.
• The reading of the voltmeter should be either 12 volts or 5 volts.
• You can always wiggle the connections to check if they are changing or not.
• Now if the voltage is not correct, then the ground wire should be repaired properly.
• Make sure to restore the PCM/TCM.
• Then one lead of an ohmmeter should be connected to the signal terminal at the TFPS sensor.
• Then the other lead should be connected to the ground at the sensor.
• You can always inspect the manufacturers specifications on the resistance of the sensor so that the resistance can be properly tested when no pressure has been applied to it.
• The resistance should be monitored and the connector at the transmission fluid pressure sensor/switch should be wiggled.
• After all the tests have been passed and still the P0872 error code is appearing, then there is some issue with the TFPS sensor or there can be some failures in the internal transmission as well.
• So, make sure that you replace the TFPS sensor. If you are not sure about it, then you can always take help from the technician.
• The PCM/TCM should be programmed properly and at the same time should be calibrated so that it can be installed properly.

Common Mistakes When Diagnosing The P0872 Code

• If the trouble code P0872 is being diagnosed by a mechanic, then he might fix the leakage in the transmission and might not realize the less fluid situation which has internally damaged the transmission.
• This may result in the restoring of the transmission because of the transmission overheating issue.