Ignition Switch Accessory Position Circuit Malfunction
The P2536 code indicates a fault in the ignition switch's accessory position circuit. This circuit powers accessories like the radio, windows, and climate control when the key is in the ACC position. The Powertrain Control Module (PCM) monitors voltage from the ignition switch; if it detects an incorrect signal or no signal when expected, it sets this code. Common causes include a faulty ignition switch, damaged wiring, or a blown fuse. This issue can prevent accessories from working or cause intermittent electrical problems.
01. Most Common Causes
- Faulty ignition switch
- Damaged or corroded wiring/connectors in the accessory circuit
- Blown fuse for the accessory circuit
- Faulty relay for the accessory circuit
- PCM software or hardware issue (rare)
02. Symptoms You Will Notice
- Accessories (radio, power windows, etc.) not working in ACC position
- Accessories working intermittently
- Engine may not start or have starting issues
- Battery drain due to accessories staying on
- Check Engine Light illuminated
03. Step-by-Step Diagnosis
Step 1: Scan for codes and note freeze frame data. Clear codes and test if they return.
Step 2: Visually inspect ignition switch and wiring for damage, corrosion, or loose connections.
Step 3: Check fuses and relays related to the accessory circuit with a multimeter.
Step 4: Test ignition switch continuity in ACC position using a wiring diagram.
Step 5: If wiring and fuses are good, replace the ignition switch.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It may be safe to drive, but accessories may not work, and there is a risk of battery drain or starting issues. It's best to diagnose and fix promptly.
How much does it cost to fix?▼
Typically $50-$150 for parts and labor, depending on the cause. Ignition switch replacement is often around $100-$200.