P0862 - OBD Trouble Code

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How does the P0862 error code occur? What are its symptoms and causes? The gear shift control module is monitored by the engine control module. If there is any problem in conversing with the gear shift control module, then the ECM will set the P0862 error code.

In order to meet the expected performance as requested by the driver, the PCM and the TCM will continuously talk with each other. If this communication is interrupted or failed, then the P0862 error code is stored.

What causes this problem with the Gear Shift Control Module 'A' Communication Circuit High?

• Damaged gear shift control module ‘A’.
• Opening or shorted circuit in the gear shift control module ’A’.
• Electrical connection of the gear shift control module ‘A’ is very poor

1. Powertrain Control Module - A faulty or defective PCM has to be replaced immediately to eliminate P0862 error code.
2. Gear Shift Modules - The gear shift module must function properly. If they are found to be defective replace them soon to avoid P0862 error code.
3. Engine Traction Control Systems - A proper functioning of the engine traction control system is highly essential to avoid P0862 error in the system.
4. Transmission Wiring Harnesses - Are the wires damaged? Then don’t worry. Parts Avatar has the replacement part for each make and models.
5. Automotive Control Modules - If you are looking to replace the damaged automotive control modules, then it’s available in best prices at Parts Avatar.
6. Speed Sensor Connectors - To avoid the P0862 error code, the faulty speed sensor connector must be replaced.

Willing to know some common symptoms of OBD Code P0862? Your wish is our demand. Have a look at them below:

Common Symptoms

• The motor will not start.
• The transmission will shift harshly.

We have listed out some ways which would help you to correct the occurrence of OBD Code P0862. They are mentioned here as follows:

• Fixing the errors in the engine traction control system.
• Replacing the damaged wires and corroded connectors.
• The faulty automotive control modules must be repaired.

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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:

• Begin the diagnosis process with the help of a diagnostic scanner and DVOM.
• Carefully check the wires and connectors for any damages as it can help you to know how this error code occurred and if an irregular connection existed.
• Now, clear every trouble code and see if the error appears again as this can help to determine if a malfunction took place or not.
• Test drive the vehicle by clearing the codes to see if it appears again.
• If you don’t find the error immediately, then it’s mainly because of the irregular condition.
• This is a quite challenging task to perform and so you have to worsen this situation to proceed further with the diagnosis.
• Handing over this major issue to the professionals is a good idea as there are many circuits involved.
• Professionals will use a specialized scanner named Auto hex as it can quickly find the malfunction in the system than ordinary scanners.
• Before you test the system, separate every pin of the CAN bus as it can save time and cut down the cost.
• Install a memory saving device to store memory, in case the PCM and other modules lose their memory and reprogram them if necessary.
• The mechanic will use a CAN scanner as it aptly records the operation of control modules and pin values.
• While the vehicle is functioning, it monitors the circuitry problem without involving any risk.
• You have to fix the shorted or corroded wires, broken connectors if any, as required.
• Recheck the system, once the repair is done, to make sure it is effective. Once you come to know that every component is working properly, connect a scanner to the diagnostic port so can recuperate every code and freeze frame data.
• You will need thousands of individual circuits to diagnose this error with the help of DVOM.
• If you misplace even one probe, then you may end up destroying the costly control modules where you have to reprogram the system. So, you can do a continuity test by disconnecting the control modules which might approximately require 40 hours based on your vehicle.
• Start the process again by checking the wires, connectors, and circuits. Few of the applications will use more than 18 separate control modules for this process.
• Carefully inspect the battery ground for continuity in the control module ground circuits.
• This error code can actually arise if there are defective or faulty system ground.
• Use the auxiliary cable, in case you want to check the differences of system ground as they are highly beneficial.
• Once the repair is done, you will find the straps, wires, and transmission ground cables hanging around which needs fixation.
• Resistance will increase and you will notice the error codes in the system if there are any damaged components. Check for continuity between connectors and controllers with DVOM’s help once you get the wiring diagram of the CAN bus system and the pinout value charts.
• Do you find any open or shorted circuit? Then replace them as specified by the manufacturer.
• Removing the defective or faulty wires is always easy than re-fixing the complicated wire circuits.

Common Mistakes When Diagnosing the P0862 Code

• PCM malfunctioning.
• Defective TCM.
• Wires are damaged.