Engine-CodesGMC – P0650 2014 GMC Sierra

P0650 2014 GMC Sierra Code - Malfunction Indicator Lamp Control Circuit

Quick Answer

The P0650 diagnostic trouble code (DTC) in a 2014 GMC Sierra indicates a malfunction in the Malfunction Indicator Lamp (MIL) control circuit. Common causes include Damaged wiring or connectors in the MIL control circuit, Faulty MIL control module, Malfunctioning ECU. 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
P0650 2014 GMC Sierra indicates Malfunction Indicator Lamp Control Circuit.
Common causes
Common causes include Damaged wiring or connectors in the MIL control circuit, Faulty MIL control module, Malfunctioning ECU.
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.
Table of contents Created and updated by William Orellana on Sep 15, 2024
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Code P0650 2014 GMC Sierra Description

The P0650 diagnostic trouble code (DTC) in a 2014 GMC Sierra indicates a malfunction in the Malfunction Indicator Lamp (MIL) control circuit. The MIL, also known as the Check Engine Light, is an important indicator that alerts the driver to potential issues with the vehicle's systems. When this code is triggered, it means that there is a problem with the circuit that controls the MIL, which can impact the vehicle's performance and emissions.

OBDII Code P0650 2014 GMC Sierra - Malfunction Indicator Lamp Control Circuit
P0650 2014 GMC Sierra Code - Malfunction Indicator Lamp Control Circuit

Common Causes of P0650 2014 GMC Sierra

  1. Damaged wiring or connectors in the MIL control circuit.
  2. Faulty MIL control module.
  3. Malfunctioning ECU.
  4. Corrosion in the circuit connections.
  5. Electrical issues in the vehicle's system.

Symptoms of P0650 2014 GMC Sierra

  1. Check Engine Light does not illuminate when there is a fault.
  2. Decreased fuel efficiency.
  3. Vehicle fails emissions tests.
  4. Loss of communication with the ECU.

How to Fix P0650 2014 GMC Sierra

  1. Use a diagnostic scanner to retrieve the DTC and identify the specific cause of the issue.
  2. Inspect the wiring and connectors in the MIL control circuit for any damage or corrosion.
  3. Test the MIL control module and ECU for proper functionality.
  4. Repair or replace any damaged wiring, connectors, or components in the circuit.
  5. Clear the DTC and test the vehicle to ensure the Check Engine Light functions correctly.

Cost to Fix P0650 2014 GMC Sierra

The typical repair costs for addressing a P0650 code in a 2014 GMC Sierra can vary depending on the specific cause of the issue. On average, the cost of parts and labor for this repair can range from $100 to $300. However, it's important to note that the actual cost may be higher or lower based on factors such as location, vehicle make and model, and the extent of the repairs needed. Additionally, diagnostic time and labor rates at auto repair shops can vary, with rates typically ranging from $80 to $150 per hour. It's recommended to check with local auto repair shops for a more accurate estimate based on your specific situation.

Tech Notes for P0650 2014 GMC Sierra

If the condition is intermittent, move the related harnesses and connectors while monitoring the scan tool MIL control circuit status parameters. Perform this test with the ignition ON and the engine OFF, and with the engine running. The MIL control circuit status parameters change from OK or Not Run to Malfunction if there is a condition with a circuit or a connection.

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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.

Frequently Asked Questions about P0650 2014 GMC Sierra Code

1. What does the OBDII code P0650 mean for a 2014 GMC Sierra?

P0650 indicates a malfunction in the Malfunction Indicator Lamp (MIL) control circuit, which may prevent the check engine light from operating correctly.

2. What are the common symptoms of code P0650 on a 2014 GMC Sierra?

The check engine light may not illuminate when there’s an issue, or it may stay on continuously. Other symptoms may include stored diagnostic trouble codes without a visible warning.

3. What causes the P0650 code to appear on a 2014 GMC Sierra?

Common causes include a faulty MIL bulb or LED, wiring issues such as short circuits or open connections, or a malfunctioning Powertrain Control Module (PCM).

4. Can P0650 affect the performance of my 2014 GMC Sierra?

While P0650 itself may not directly impact performance, it can prevent you from being alerted to other critical issues that could affect the vehicle's operation.

5. How do I diagnose the P0650 code in my 2014 GMC Sierra?

Start by inspecting the MIL bulb or LED for proper operation, then check the wiring and connectors for damage or corrosion, and finally test the PCM for faults.

6. What tools are needed to fix the P0650 code on a 2014 GMC Sierra?

You’ll need an OBDII scanner, a multimeter for testing electrical connections, and possibly wiring repair tools if damaged circuits are identified.

7. Can I drive my 2014 GMC Sierra with a P0650 code?

Yes, you can drive the vehicle, but you won’t be alerted to other potential issues if the MIL isn’t working properly.

8. How much does it cost to repair a P0650 code on a 2014 GMC Sierra?

Repair costs vary depending on the issue. Replacing a bulb or LED may cost $50-$100, while wiring repairs or PCM replacement could range from $200 to $1,000.

9. Can a P0650 code be cleared without fixing the issue?

You can clear the code temporarily with an OBDII scanner, but it will likely return if the underlying problem isn’t resolved.

10. What should I do if the P0650 code keeps coming back on my 2014 GMC Sierra?

If the code persists, recheck the wiring, MIL bulb, and connections, and consider having the PCM tested or replaced if all other components are functioning correctly.

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