P0802 - OBD Trouble Code

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Is the circuit of the transmission control system open? Does the error code P0802 keep popping up? Then this is a general type of error which lets you know that the malfunction indicator lamp is poorly functioning and hence the P0802 error code is stored in the vehicle. This error code can also mean that many other failures have taken place. If an anomaly is identified, an error code will be sent by the PCM which further gives rise to the P0802 trouble code.

If the P0802 error code is stored in your vehicle, then the illumination of the malfunction indicator lamp and the improper functioning of the automatic transmission control system will take place. The error code also indicates that there are several other failures which has taken place in the system. The error code can also be due to the faulty wires and the corroded connectors between the MIL which has cause the P0802 error code to be stored in your vehicle.

What causes this problem with the Transmission Control System MIL Request Circuit/Open?

• Transmission control module is defective.
• The joints of TCM is open or shorted.
• The electrical connection of TCM is bad.
• Program error in the controller.

1. Transfer Case - A broken or faulty transfer case has to be replaced immediately to avoid P0802 error code.
2. Transfer Case Control Module - Is the transfer case control module broken? Find them at Parts Avatar at an affordable cost.
3. Transfer Case Actuator - Does your vehicle produce weird noises during shifting gears? Then it’s because of this defective component which needs replacement.
4. Transfer Case Sensor - The P0802 error code can be avoided if the broken transfer case sensor is changed with a new one.
5. Transmission Control Module - The system may malfunction if the TCM is faulty. Replace them as soon as possible.
6. Engine Control Module - Replacement of the faulty ECM can help you to avoid the P0802 trouble code.
7. Powertrain Control Module - Is your PCM faulty or broken? Don’t worry. Get them from Parts Avatar at best prices online.

Interested in knowing the symptoms to OBD code P0802? If yes, then you have arrived at the right place. We at Parts Avatar have listed out few common symptoms associated with Transmission Control System MIL Request Circuit/Open.

Common Symptoms

• The car will malfunction due to the lack of check engine light.
• Burning or slipping of the transmission.
• Shifting may be impossible or tough.
• The engine stops functioning.

Have a look at some ways with which you can correct the P0802 code:

• Check the error codes with a scanner and change the faulty connectors/wires.
• Visually inspect for any burnt malfunction indicator lamp bulbs and replace them.
• P0802 trouble code, is very informative where the mechanic has to check if the PCM has stored any other codes.
• This process can include - fixing the faults in the transmission in multiple ways. Once the specific component is checked, you have to remove the stored error code in the PCM and retest the vehicle which can help the technician to narrow down the problem.
• If every problem is addressed including the MIL bulbs and other electrical parts, then you will not see the P0802 error code in your vehicle.

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Here are some steps which you should follow in order to diagnose this P0802 fault code:

• You have to recover the freeze frame data and stored codes with the help of a scanner. It is always best to write down this data. Now test drive your car and see if the code is reset or if the PCM enters readiness mode. If either of this action happens, then it may be tough to diagnose as the code is erratic. And so, you have to worsen this condition before proceeding for further diagnosis.
• If the code seems to reset immediately, then you will have to continue with diagnosis and look out for your vehicle’s information source to get the diagnostic flowcharts, connector pinout charts, face views of the connectors, and component testing conditions.
• At the TCM or PCM you have to check both the voltage and ground circuits with the help of a DVOM. If both the voltage and ground circuits are found, then you have to check the output of controller with the same DVOM. Start by checking the components and sensors which is related to particular symptoms. If any of the parts fail to agree with the suggestion conditions, they those parts will be faulty.
• Test the circuit using DVOM if no parts have failed. Check them with the voltage drop testing method by separating all controllers before you test the resistance with DVOM.

Common mistakes when diagnosing the P0802 Code

As this error code will result in the illumination of the check engine light, it can also mean that the other stored trouble codes are either not checked or addressed. If a P0802 error code is stored, then it’s always best to check the PCM for other trouble codes.