AutoCodes – GMC – P0513 GMC

P0513 GMC Code - Immobilizer Key Incorrect

Quick Answer

The immobilizer system functions are provided by the Body Control Module (BCM) and the Engine Control Module (ECM), as well as any control modules that store and report the environment identifier. Common causes include Immobilizer Key not programmed to the vehicle, Faulty Immobilizer Key, Faulty Body Control Module (BCM). 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: P0513 GMC indicates Immobilizer Key Incorrect.
Common causes: Common causes include Immobilizer Key not programmed to the vehicle, Faulty Immobilizer Key, Faulty Body Control Module (BCM).
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 20,211

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 30, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0513 GMC Description

The immobilizer system functions are provided by the Body Control Module (BCM) and the Engine Control Module (ECM), as well as any control modules that store and report the environment identifier.
When an ignition key is inserted into the ignition lock cylinder and the ignition is switched ON, the transponder in the key is energized by the immobilizer coil surrounding the ignition lock cylinder. This immobilizer coil is part of the immobilizer control module. The transponder transmits a signal that contains its unique value, which is received by the BCM through the immobilizer coil. The BCM then compares this value to a value stored in memory. The BCM also monitors various control modules to determine if the stored environment identifiers match.
If both the environment identifier and the value received from the transponder match, the BCM will send the prerelease password via serial data to the ECM. If the encrypted code's unique value is incorrect or the environment identifier does not match, the BCM will send the start to disable message to the ECM which will prevent the vehicle starter and fuel pump from operating.
When the ECM receives the BCM prerelease password, the ECM will challenge the password. The ECM sends this challenge to the BCM via serial data. Both the ECM and BCM perform a calculation on this challenge. If the BCM calculated response to the challenge equals the calculation performed by the ECM, the ECM will allow the vehicle to start.
The Diagnostic Trouble Code (DTC) will be set when the calculated response from the BCM does not equal the calculation performed by the ECM.

OBDII Code P0513 GMC - Immobilizer Key Incorrect - AutoCodes.com — P0513 GMC Code - Immobilizer Key Incorrect

What does this mean?

What are the Possible Causes of the DTC P0513 GMC?

Immobilizer Key not programmed to the vehicle
Faulty Immobilizer Key
Faulty Body Control Module (BCM)

How to Fix the DTC P0513 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 does this mean?

Code Tech Notes

DTC P0513 may be caused by a loose connection or intermittent poor continuity on the ECM ground or at the negative battery cable. Be sure to check the ECM ground(s) and negative battery cable if the normal system diagnosis does not correct the concern.

There is a Factory Service Bulletin for the following GMC models:
2010 GMC Savana
2011 GMC Savana
2011 GMC Sierra
GMC Factory Service Bulletin OBDII Code P0513

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0513 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 P0513 GMC code?

Need more information on how to fix the P0513 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0513 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

P0513 2014 GMC Sierra — Immobilizer Key Incorrect
P0513 2015 GMC Sierra — Immobilizer Key Incorrect
P0513 2016 GMC Sierra — Immobilizer Key Incorrect
P0513 2017 GMC Sierra — Immobilizer Key Incorrect
P0513 2018 GMC Sierra — Immobilizer Key Incorrect

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 P0513 GMC Code

1. What are the common symptoms of OBDII code P0513 GMC (Immobilizer Key Incorrect)?

- Common symptoms include the engine not starting, the security light staying on, and the key not being recognized by the vehicle.

2. What are the possible causes of OBDII code P0513 GMC?

- Possible causes include a faulty key, a damaged key transponder, issues with the immobilizer system, or a problem with the key reader in the vehicle.

3. How can I diagnose the cause of OBDII code P0513 GMC?

- To diagnose the cause, you can try using a spare key, checking for damage on the key transponder, inspecting the immobilizer system, or consulting a professional mechanic for further diagnostics.

4. Can I still drive my vehicle with OBDII code P0513 GMC active?

- It is not recommended to drive the vehicle with this code active, as it may prevent the engine from starting or cause other issues while driving.

5. How can I repair OBDII code P0513 GMC?

- Repair options may include reprogramming the key, replacing the key transponder, repairing the immobilizer system, or seeking assistance from a qualified technician.

6. Is it possible to reset OBDII code P0513 GMC without professional help?

- In some cases, you may be able to reset the code by disconnecting the battery for a few minutes, but it is important to address the underlying issue to prevent the code from recurring.

7. Will OBDII code P0513 GMC cause permanent damage to my vehicle?

- This code itself does not typically cause permanent damage, but it can lead to inconvenience and potential starting issues if not addressed promptly.

8. Are there any DIY tips for troubleshooting OBDII code P0513 GMC?

- DIY tips may include checking the key for damage, ensuring the key is properly programmed, and inspecting the key reader for any visible issues.

9. How much does it cost to repair OBDII code P0513 GMC?

- The cost of repair can vary depending on the cause of the issue, with potential expenses for key replacement, transponder reprogramming, or immobilizer system repairs.

10. Can OBDII code P0513 GMC be triggered by other vehicle problems?

- While this code is typically related to immobilizer key issues, it is possible for other electrical or security system problems to trigger a similar error code.