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P0513 2018 GMC Sierra Code - Immobilizer Key Incorrect

Quick Answer

The P0513 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates that the immobilizer key is incorrect. Common causes include Faulty transponder chip in the key, Key not programmed or synced with the vehicle's immobilizer system, Issues with the immobilizer system wiring or connections. 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 2018 GMC Sierra indicates Immobilizer Key Incorrect.
Common causes
Common causes include Faulty transponder chip in the key, Key not programmed or synced with the vehicle's immobilizer system, Issues with the immobilizer system wiring or connections.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 18, 2024
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Code P0513 2018 GMC Sierra Description

The P0513 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates that the immobilizer key is incorrect. The immobilizer system is a security feature in modern vehicles that prevents the engine from starting unless the correct key is used. When the engine control module (ECM) detects that the key being used is not programmed or recognized, it triggers the P0513 code. This can be a serious issue as it can prevent the vehicle from starting or running properly.

OBDII Code P0513 2018 GMC Sierra - Immobilizer Key Incorrect
P0513 2018 GMC Sierra Code - Immobilizer Key Incorrect

Common Causes of P0513 2018 GMC Sierra

  1. Faulty transponder chip in the key.
  2. Key not programmed or synced with the vehicle's immobilizer system.
  3. Issues with the immobilizer system wiring or connections.
  4. ECM malfunction or software glitch.
  5. Attempted theft or tampering with the immobilizer system.

Symptoms of P0513 2018 GMC Sierra

  1. Engine cranks but does not start.
  2. Security light on the dashboard stays illuminated.
  3. Inability to start the engine even with a known working key.
  4. Loss of power or engine stalling while driving.

How to Fix P0513 2018 GMC Sierra

  1. Verify the key: Ensure that the key being used is the correct one for the vehicle and that it is programmed and synced with the immobilizer system.
  2. Check wiring and connections: Inspect the wiring and connections related to the immobilizer system for any damage or loose connections.
  3. Reset the ECM: Use a diagnostic scanner to reset the ECM and clear the P0513 code. This may require reprogramming the keys.
  4. Replace key/transponder: If the key or transponder chip is faulty, it may need to be replaced and reprogrammed.
  5. Professional diagnosis: If the issue persists after basic checks and repairs, it may be necessary to seek professional help from a certified mechanic or dealership for further diagnosis and repair.

Cost to Fix P0513 2018 GMC Sierra

The cost of repairing a P0513 code can vary depending on the specific cause of the issue. Replacing a key or transponder chip can range from $50 to $200, including programming fees. If the ECM needs to be reprogrammed or replaced, the cost can be higher, potentially reaching $500 or more. Labor costs can add to the total repair bill, with rates typically ranging from $80 to $150 per hour. It's recommended to consult with a local auto repair shop for a more accurate estimate based on the specific circumstances of the vehicle.

What does this mean?

Tech Notes for P0513 2018 GMC Sierra

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 Chevrolet models:

2010 Chevrolet Express

2011 Chevrolet Express

2011 Chevrolet Silverado

Chevrolet Factory Service Bulletin OBDII Code P0513

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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.

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