Ignition Switch Accessory Position Circuit Malfunction
The P2536 code indicates a fault in the ignition switch's accessory position circuit. This circuit provides power to accessories like the radio, power windows, and climate control when the key is in the ACC position. A malfunction can be caused by a faulty ignition switch, wiring issues, or a blown fuse. The ECM detects an incorrect voltage signal from the circuit.
1. Most Common Causes
- Faulty or worn ignition switch
- Damaged, corroded, or loose wiring in the accessory circuit
- Blown accessory circuit fuse
- Body control module (BCM) internal failure
- Bent or corroded pins in the ignition switch connector
- Short to ground or voltage in the circuit wiring
2. Symptoms You Will Notice
- Accessories (radio, windows, etc.) not working in ACC position
- Engine may not start or stall
- Battery drain
- Check Engine Light illuminated
3. Step-by-Step Diagnosis
Step 1: Use a multimeter to check voltage at the ignition switch accessory terminal with key in ACC position.
Step 2: Inspect fuses related to the accessory circuit and replace if blown.
Step 3: Visually inspect wiring and connectors for damage, corrosion, or looseness.
Step 4: Test the ignition switch continuity and replace if faulty.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended as it may cause accessories to fail or the engine to stall, posing a safety risk.
How much does it cost to fix?▼
Typically $50-$150 for parts and labor, depending on the cause and vehicle model.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.