P27A0 - OBD Trouble Code

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The trouble code P27A0 can be defined as Four Wheel Drive (4WD) Range Signal Circuit High. The four wheel drive switch would allow the person who is driving the car to shift from 2-wheel drive to 4-wheel Low or 4-wheel high, and it all depends upon the driving conditions. Now if an unusual signal would be sent back by the 4-wheel drive switch, then the P27A0 fault code would be set.

The four wheel drive (4WD) range signal circuit is being monitored by the transmission control module. This trouble code would be set by the TCM when the four wheel drive (4WD) range signal circuit would not be as per the specifications set by the manufacturer. The engine control module, powertrain control module or the transmission control module monitors this circuit depending upon the particular automobile.

What causes this problem with the Four Wheel Drive (4WD) Range Signal Circuit High?

• Some flaws in the four wheel drive range
• Four wheel drive range harness might be opened or sometimes shorted
• Four wheel drive range circuit might have inadequate electrical connection

1. Automatic Transmission Module - Sometimes the transmission module is unable to communicate or correctly anticipate the speed of the vehicle and thus creates difficulty in gear shift leading to sluggish acceleration, throttle response and stalling. Thus can also hamper a lot of components physically and thus must be checked and replaced, if required.
2. Engine Control Module - There can be some engine performance issues due to faulty engine control module. If the ECM fails or has any problems it can lead to performance issues with the vehicle like misfires, hesitation, loss of power, and sometimes even decreased fuel economy.
3. Powertrain Control Module - PCM stands for powertrain control module. It is a car part, a control unit which is utilized on motor vehicles. It is generally a combined control unit, consisting of the engine control unit (ECU) and the transmission control unit (TCU).
4. Electronic Control Unit - If your automobile's check engine light remains on constantly, and never goes off, there's a good chance that your vehicle has a damaged electronic control unit. There are a lot of reasons why a car's check engine light will remain on. The most common reason is a defective ECU.
5. Diagnostic Tools - It is always advisable to use the correct tools and equipment while resolving any OBD code issue as even small mistakes can lead to wrong diagnosis. Thus, always take help from a professional who has the knowledge and experience to such tools in an efficient manner. Buy new quality diagnostic tools from us today!

Our main motive is to achieve customer satisfaction as for us our customers are everything and that’s why we will help you to diagnose P27A0 code by mentioning some major symptoms below:

Common Symptoms

• The service engine soon light can start lighting up
• The 4-wheel drive system might be disabled

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 P27A0:

• You must fix the defective four wheel drive range
• Make sure to mend the faulty four wheel drive range harness
• It is essential to restore the flawed four wheel drive range circuit
• Repair or replace the quirky powertrain control module

However, if you face any issue then we have stocked a wide range of best priced four-wheel drive switch, transfer case, four wheel drive system, transmission control module, four wheel drive system parts, 4 wheel drive system parts, body control module component, electronic control module, transmission shift solenoid, pcm car, ecm car, pcm module, ecm module and more to help you out in fixing your car.

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

• This is a general type of error code which is diagnosed with the help of a scanner.
• The mechanic will insert a scanner to diagnostic port of the vehicle and recover the codes and freeze frame data.
• If he happens to find any additional error codes, he has to address them as well.
• Once it is done, he has to reset the vehicle, and then test drive to see if the error code appears.
• If the error code does not return, then there can be an erratic condition.
• Then the mechanic has to check the wires, connectors and other electrical components and quickly replace them if he finds them to be damaged or defective.
• Check for the damaged four wheel drive range circuit and its components for error. It the mechanic finds the fault in the connectors in relation to the four wheel drive range, replace it immediately.
• Also check for the particular battery cells emitting high voltages and thus might need battery replacement as well.
• Parts or components should not be replaced with reference to only a P27A0 DTC. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing.
• If all the components seems to work perfectly, inspect the PCM for faults and replacement along with reprogramming.

Common Mistakes When Diagnosing The P27A0 Code

• Non performance of the 4-wheel drive switch
• Failure in the car wiring
• There might be some flaws in the transmission control module (TCM)
• The transfer case might not function properly