Error Code P2537: What It Means & What To Do?

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Do you know how the P2537 error get stored in the vehicle? Do you want to know the diagnostic procedure? Keep going ahead. Improper transmission shift by the vehicle is commonly called as an ignition switch accessory position circuit low. As you turn on the key of the vehicle, the battery voltage is supplied to all electrical systems which are correctly looked after by the transmission control module in order to verify that the voltage supply is correct. If the low voltage has been identified by the transmission control module, then the P2537 error code will be set.

The PCM looks closely at the ignition switch accessory position signal. If the factory specification is not properly met by the ignition switch accessory position signal, then the PCM will set the P2537 error code in the vehicle.

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

• The ignition switch might be damaged.
• You will see an opening or short circuit in the ignition switch harness.
• Bad electrical connection in the circuit of the ignition switch.

1. Powertrain Control Module - Illumination of the check engine light is a common symptom of faulty PCM. Change it immediately.
2. Ignition Switch - Stalling of the car is an indication of a faulty ignition switch. Change it quickly to avoid P2537 error.
3. Battery Control Module - The battery control module holds the responsibility for monitoring the power of the batteries. In order to avoid the P2537 error in your vehicle, replace the damaged battery control module.
4. Starter Motor - If you hear cranking noise from the engine after the vehicle starts, then the starter motor can be damaged. Replace it with a new one from PartsAvatar.
5. Transmission Control Module - Flashing of the check engine light is an indication of a defective transmission control system. Fix it as soon as possible.

It is vital 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 P2537 here:

Common Symptoms

• The light will be erratic or the light will remain the same when the DPF is restored. During acceleration, the engine might be lethargic.
• Damaged ECM.
• If the DPF is not corrected, the ECM will remain in the ‘limp home mode’ until and unless the situation is made alright.
• Decreased fuel efficiency.

Want to correct the Trouble Code P2537? Read these points mentioned below:

• The P2537 error can be resolved by altering the defective ignition switch.

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It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P2537 code to be stored:

• The ignition switch helps to send voltage from the battery and cables to every system in the vehicle.
• The voltage that is sent through the ignition switch is commonly known as "switched voltage, where a mechanized actuator is turned with the help of a keyed cylinder.
• Battery voltage is given to the inner side of the ignition switch with the help of fused primary wiring and cables.
• The switched voltage will get deactivated when the ignition switch is turned off.
• This can help you to save battery voltage and also makes transportation more consistent.
• 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.
• To diagnose this error, you will need many tools to find out how this error got stored in the vehicle.
• To carefully diagnose you will need a DVOM and scanner.
• You will also need a manufacturer’s service manual.
• Visually inspect the wires and the connectors.
• Repair the separated, eroded and damaged wires, connectors and other parts as needed.
• Retest the system after a successful diagnosis. If every component is in proper working condition, then attach a scanner to the diagnostic connector and recover the stored codes and freeze frame data.
• This step can be highly useful to determine if there are any erratic conditions which made to the code to get stored.
• Clear the codes and test the vehicle to see if the error returns.
• This can help you to know if the malfunction was erratic. Clear the codes again and test drive to see if the error reappears.
• There might be an erratic condition if the code refuses to return instantly.
• It can be quite challenging to diagnose this error code where at times you have to worsen this condition.
• Check for battery voltage and ground signals at the ignition switch, if the code shows up again.
• With the help of DVOM check for openings in the ground or battery voltage circuit for continuity and resistance in both the circuits.
• Clear all codes and retest the vehicle to see if any error has occurred.
• Pay close attention to the fuses and fusible links and make sure to locate the reason for the failure of the fuse and fusible links to avoid further damage.
• With the help of the manufacturer’s wire diagram test 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 comply with the manufacturer’s specification.
• Make sure that the repair was successful once the system was re-checked.

Common Mistakes When Diagnosing the P2537 Code

• Faulty ignition switch.
• Electrical wires might cause some trouble.
• Failure of the transmission control module.