Guide To P279B OBD Error Code Solutions

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The trouble code P279B can be explicated as Transfer Case Gear Low Incorrect Ratio. 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.

It is the transfer case control module which would examine the transfer case. This trouble code would be set by the transfer case control module when the transfer case would not be as per the parameters set by the manufacturer.

What causes this problem with the Transfer Case Gear Low Incorrect Ratio?

• Imperfect transponder key electronic control unit
• Issue of unbolted transponder key electronic control unit harness
• Unacceptable electrical connection in the transponder key electronic control unit circuit

1. 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!
2. Engine Control Module - The solenoid might cause a short in the engine control module because of corrosion in the solenoid or the wire running from the solenoid to the ECM harness.
3. Electronic Control Unit - The ECU power management control module keeps in check the hybrid battery charging functions. If the ECU is faulty, the battery pack will not be able to properly get charged and thus, the ECU might need replacement.
4. Powertrain Control Module - A trouble with the PCM would mean that it is unable to determine the right fuel mixture and would send the car engine either more or less fuel than it requires. Now when the engine gets more, the carbon emission would increase and fuel economy would drop. In case of the opposite, the engine will choke, stutter, and might start stalling sometimes.
5. Diagnostic Tool - Usually any OBD code problem requires deep insight into the problem and high grade tools in order to fix it properly. Thus, buy quality diagnostic tools form us!

It is essential 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 P279B here:

Common Symptoms

• Illumination in the service engine soon light
• 4-wheel drive system might be disarmed

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 P279B:

• It is essential to restore the flawed transponder key electronic control unit harness
• Carefully adjust the faults in the transponder key electronic control unit
• The transponder key electronic control unit circuit should be restored to working order

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If you want to easily diagnose this trouble code, then you must follow the steps which are mentioned here as below:

• Make sure that the transfer case gear is tight and clean. Some people think that it is an obvious step, but if your computer does not get a steady feed transfer case gear, it can cause multiple issues.
• Check for wires and connectors that might be rubbed through, disconnected or loose. It is also important to check the fuse box in your vehicle together with the relay centre that can be found under the hood.
• It is also important to make sure that the fuses are good. Make sure that there is no melted plastic that can cause fire.
• These are some of the major wiring problems that you will encounter with error code P279B. Once you have completely checked all the obvious things and still you can’t find the right solution, then you have to begin suspecting either the computer or the sensor.

Common Mistakes When Diagnosing The P279B Code

• Transfer case internal related issues
• Quirks in the transfer case control module
• Issues related with the car wiring