P2538 Fault Code

Ignition Switch Accessory Position Circuit High

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2538 fault code indicates an issue with the ignition switch accessory position circuit being high. This code is logged when the vehicle's computer detects that the voltage level in the circuit that is supposed to signal the accessory position of the ignition switch is higher than expected. This could potentially affect the functionality of various accessories in the vehicle, including the radio, dashboard lights, and other electronic devices.

What are the symptoms of the P2538 code?

Drivers may experience a few noticeable symptoms when the P2538 fault code is present, such as:

• Difficulty engaging the accessory position of the ignition.
• Accessories not functioning properly (e.g., radio, power windows).
• Warning lights or messages displayed on the dashboard.
• The vehicle may not start or exhibit intermittent electrical issues.

What causes the P2538 code?

Several factors can cause the P2538 code, including:

• A faulty ignition switch.
• Damaged wiring or poor connections in the circuit.
• Short circuits in the electrical system.
• Issues with associated components like the Body Control Module (BCM) that manage the accessory circuits.

How to fix P2538?

To resolve the P2538 fault code, you should:

• Inspect the ignition switch for proper operation and replace it if it is faulty.
• Check all related wiring for damages, corrosion, or loose connections.
• Use a multimeter to test the voltage in the circuit and ensure it matches specifications.
• If necessary, replace or repair any damaged wires or connectors.
• Clear the fault codes and retest the system to confirm proper operation.