What Does P2536 Mean?
The PCM has detected a fault in the ignition switch ACCESSORY position circuit. This indicates an electrical problem with the circuit that signals when the ignition key is in the ACC position, affecting accessory power control.
Common Causes
35%
Faulty ignition switch with worn or damaged ACC position contacts
25%
Corroded or loose connector at ignition switch
20%
Broken or damaged wiring in ACC position circuit
15%
Worn ignition lock cylinder preventing proper switch engagement
5%
Intermittent open or short in ignition switch harness
Diagnostic Steps
1
Step 1: Verify code is active by turning ignition to ACC position and monitoring live data for switch position signal
2
Step 2: Inspect ignition switch connector for corrosion, damage, or loose fit
3
Step 3: Test ignition switch ACC position circuit continuity with key in ACC position
4
Step 4: Check wiring between ignition switch and PCM for damage, shorts, or opens using wiring diagram
5
Step 5: Substitute ignition switch with known-good unit if wiring and connectors test good
Estimated Repair Cost
$100 - $500
Parts + labor, varies by vehicle and location
The PCM has detected a fault in the ignition switch ACCESSORY position circuit. This indicates an electrical problem with the circuit that signals when the ignition key is in the ACC position, affecting accessory power control.
The most common cause of P2536 (Ignition Switch Accessory Position Circuit) is: Faulty ignition switch with worn or damaged ACC position contacts
Typical repair costs for P2536 range from $100 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Minimal immediate safety impact but may prevent proper accessory operation. Could affect radio, power windows, and other accessories when key is in ACC position.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2536 to identify the root cause.
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Quick Info
Category
Powertrain
System
Ignition System / Accessory Power System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
