P2538 OBD Error Code: Problem & Solutions

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Are you looking for the cause and the diagnostic procedure of the P2538 error code? Then keep reading further. A malfunction in the ignition switch run position circuit has been found by the PCM. The voltage to the PCM, ignition, and fuel delivery system is sent by the ignition switch.

The ignition switch accessory position signal is carefully looked after by the powertrain control module. If the ignition switch accessory position signal is out of factory specification, then the PCM will set the P2538 error code.

What causes this problem with the Ignition Switch Accessory Position Circuit High?

• The ignition switch might seem to be defective.
• You might find an opening in the ignition switch harness or the circuit might be shorted.
• The electrical connection might be poor in the ignition switch circuit.

1. Powertrain Control Module - Overheating of the PCM can likely damage your PCM. Change it quickly by getting a new PCM from PartsAvatar.
2. Ignition Switch - Does your engine misfire? Then the ignition switch can be faulty. Alter it as soon as possible.
3. Battery Control Module - The battery control module looks after the charging of the batteries. It is always best to replace your faulty battery control module so that the P2538 error code can be avoided.
4. Starter Motor - A broken starter motor itself can cause trouble to start your vehicle. Fix it as soon as possible to avoid further troubles.
5. Transmission Control Module - Your transmission control module can be faulty if the fuel economy of your vehicle is too low. Fix it as soon as possible.

Willing to know some common symptoms of OBD Code P2538? Your wish is our demand. Have a look at them below:

Common Symptoms

The light might keep blinking erratically or will remain the same. The engine will be slow during acceleration.

• The engine might refuse to accelerate.
• Very high or lean exhaust.
• Leakage from the exhaust will be high.

We have listed out some ways which would help you to correct the occurrence of OBD Code P2538. They are mentioned here as follows:

• By replacing the defective ignition switch, this error can be avoided.

There is no need to get strained if your OBD Code is still flashing up as we are here at your service. Have a look at our superior variety of PCM, ignition switch, battery control module, battery voltage, ohmmeter, starter motor, transmission control module and many more. Now all your problems would vanish within no time.

If you want to easily diagnose this fault code P2538, then all you have to do is to follow the steps which are mentioned below:

• Voltage is sent from the battery and cables to all electrical systems with the help of ignition switch.
• This switch is normally known as switched voltage where a mechanized actuator is used to turn the cylinder key.
• The actuator which is made up of heavy grade contacts will withstand the high current draw.
• With the help of fused primary wires and cables, the battery voltage is sent to the inner portion of the ignition switch and when it is turned off, the system which functions with the help of switched voltage will get neutralized.
• This will make transportation reliable and save battery voltage.
• Once the switch is fixed to the accessory or auxiliary position, switched voltage will be sent to the system which is linked with stationary use.
• Activate the starter by fixing the ignition switch in the start position and start the engine.
• The voltage is almost sent to all switched voltage system during run position
• A scanner and DVOM can be highly useful to diagnose this error code.
• You will be needing a service manual of the manufacturer or anything equivalent to it.
• Visually check every wires and connectors.
• Fix the defective, detached or shorted wires, connectors, and other parts as necessary
• Recheck the system after every repair to make sure the diagnosis is successful.
• If every system appears to be in proper working condition, attach a scanner to the diagnostic connector and recover every freeze frame data and stored codes.
• In order to diagnose the erratic condition, this information can be highly helpful as you can know how this error code was stored.
• Clear the error codes and check again to see if the error appears.
• This can help you to know if there is any erratic signal stored in the vehicle.
• Clear the error codes and check again if they appear so it can help to know if any malfunction occurred.
• If the code does not instantly return, it is because of an irregular condition.
• Try to worsen this situation before proceeding with further diagnosis as it is a risky task.
• Visually inspect the battery voltage and ground signals at the ignition switch, if the code shows up again.
• With the help of DVOM see if there are any openings in the ground or battery voltage circuit for continuity and resistance in both the circuits.
• Clear every code and retest the vehicle to see if the error shows up again.
• Pay close attention to the fuses and fusible links and ensure to find the reason for the failure of the fuse and fusible links to avoid further defects.
• With the help of the manufacturer, wire diagram tests the circuit for resistance and continuity and relate your findings with that of the manufacturer.
• Fix each of the circuits, connectors, and components which fails to agree with the manufacturer’s specification.
• Make sure that the repair was successful once the system was re-checked.

Common Mistakes When Diagnosing the P2536 Code

• Ignition switch might be defective.
• Troublesome electrical wires.
• TCM might be faulty.