Ignition Switch Accessory Position Circuit High

Where it lives

For P2538, the circuit described runs through the switch. The description of P2538 reports a fault at the switch.

Check these first

• A short to voltage on the accessory position circuit
• A failed ignition switch
• Corrosion at the ignition switch connector
• Chafed accessory position circuit wiring

What to do next

1. Read the accessory position input on a scan tool
2. Test the accessory circuit for a short to voltage
3. Inspect the accessory circuit wiring for chafe
4. Check the ignition switch connector for corrosion
5. Replace the ignition switch if the circuit tests good
6. Clear the code and retest

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