AutoCodes – GMC – P2536 GMC

P2536 GMC Code - Ignition Accessory Switch Circuit

Quick Answer

The control module continuously monitors the voltage on the Ignition Accessory/Run circuit from the Body Control Module (BCM). Common causes include Faulty Body Control Module (BCM), Body Control Module harness is open or shorted, Body Control Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P2536 GMC indicates Ignition Accessory Switch Circuit.
Common causes: Common causes include Faulty Body Control Module (BCM), Body Control Module harness is open or shorted, Body Control Module circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 930

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Sep 21, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2536 GMC Description

The control module continuously monitors the voltage on the Ignition Accessory/Run circuit from the Body Control Module (BCM). When the ignition is in the ACCESSORY or RUN position, the BCM sends a 12 V wake-up signal to the control module. This wake-up signal allows the control module to power up and start functioning before the engine is started. The Diagnostic Trouble Code (DTC) will be set when the control module detects the Ignition Accessory/Run circuit is less than 6 V for 1 min.

OBDII Code P2536 GMC - Ignition Accessory Switch Circuit - AutoCodes.com — P2536 GMC Code - Ignition Accessory Switch Circuit

What does this mean?

What are the Possible Causes of the DTC P2536 GMC?

Faulty Body Control Module (BCM)
Body Control Module harness is open or shorted
Body Control Module circuit poor electrical connection

How to Fix the DTC P2536 GMC?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2536 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P2536 GMC code?

Need more information on how to fix the P2536 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2536 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

P2536 2014 GMC Sierra — Ignition Accessory Switch Circuit
P2536 2015 GMC Sierra — Ignition Accessory Switch Circuit
P2536 2016 GMC Sierra — Ignition Accessory Switch Circuit
P2536 2017 GMC Sierra — Ignition Accessory Switch Circuit
P2536 2018 GMC Sierra — Ignition Accessory Switch Circuit

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2536 GMC Code

What does the OBDII code P2536 indicate?

The OBDII code P2536 indicates a problem with the ignition accessory switch circuit in a GMC vehicle, often related to electrical issues affecting the ignition system.

What are the common symptoms of a P2536 code?

Common symptoms include difficulty starting the vehicle, intermittent electrical issues, dashboard warning lights, or the engine stalling unexpectedly.

What could cause the P2536 code to appear?

Causes may include a faulty ignition switch, damaged wiring or connectors in the ignition circuit, or issues with the vehicle's Body Control Module (BCM).

How can I diagnose a P2536 code effectively?

To diagnose a P2536 code, check the ignition switch for proper operation, inspect wiring for damage or corrosion, and use a multimeter to test the circuit continuity.

What repairs might be necessary for a P2536 code?

Repairs may involve replacing a faulty ignition switch, repairing or replacing damaged wiring, or reprogramming or replacing the BCM if it is determined to be faulty.

Can a dead battery trigger the P2536 code?

Yes, a dead or weak battery can cause electrical issues that may trigger the P2536 code, especially if it affects the ignition circuit's operation.

Is the P2536 code serious?

The P2536 code can be serious as it may lead to starting issues or stalling, potentially resulting in unsafe driving conditions. It is advisable to address it promptly.

Will clearing the code fix the problem?

Clearing the code may temporarily turn off the warning light, but it will not fix the underlying issue. The root cause needs to be diagnosed and repaired for a permanent solution.

Can I drive my vehicle with a P2536 code?

While it may be possible to drive your vehicle, it is not recommended as the code indicates potential ignition issues that could lead to breakdowns or safety hazards.