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Engine-Codes – GMC – P0650 2016 GMC Sierra

P0650 2016 GMC Sierra Code - Malfunction Indicator Lamp Control Circuit

Quick Answer

The P0650 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates a malfunction in the Malfunction Indicator Lamp (MIL) control circuit. Common causes include Faulty wiring or connectors in the MIL control circuit, Malfunctioning control module responsible for activating the check engine light, Corrosion or damage to the circuitry related to the MIL. 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 2016 GMC Sierra indicates Malfunction Indicator Lamp Control Circuit.
Common causes
Common causes include Faulty wiring or connectors in the MIL control circuit, Malfunctioning control module responsible for activating the check engine light, Corrosion or damage to the circuitry related to the MIL.
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 11, 2024
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Code P0650 2016 GMC Sierra Description

The P0650 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates a malfunction in the Malfunction Indicator Lamp (MIL) control circuit. The MIL, also known as the check engine light, serves as a crucial warning system that alerts the driver to potential issues with the vehicle. When this code is triggered, it means that there is a problem with the circuit responsible for controlling the activation and deactivation of the MIL.

OBDII Code P0650 2016 GMC Sierra - Malfunction Indicator Lamp Control Circuit
P0650 2016 GMC Sierra Code - Malfunction Indicator Lamp Control Circuit

Common Causes of P0650 2016 GMC Sierra

  1. Faulty wiring or connectors in the MIL control circuit.
  2. Malfunctioning control module responsible for activating the check engine light.
  3. Corrosion or damage to the circuitry related to the MIL.
  4. Electrical issues such as a blown fuse or relay.
  5. Software glitches in the vehicle's onboard computer system.

Symptoms of P0650 2016 GMC Sierra

  1. Check engine light stays on continuously.
  2. Inability to retrieve diagnostic trouble codes from the vehicle's onboard computer.
  3. Fluctuating or erratic behavior of the check engine light.
  4. Vehicle may fail emissions testing.
  5. Decreased fuel efficiency.

How to Fix P0650 2016 GMC Sierra

  1. Begin by conducting a thorough inspection of the wiring, connectors, and control module related to the MIL circuit.
  2. Test the circuitry using a multimeter to identify any areas of concern, such as breaks or shorts.
  3. Replace any damaged wiring, connectors, or components as needed.
  4. Clear the DTC from the vehicle's onboard computer using a diagnostic scan tool.
  5. Test the system to ensure the check engine light functions properly and responds to vehicle conditions.

Cost to Fix P0650 2016 GMC Sierra

The cost of repairing a P0650 code on a 2016 GMC Sierra can vary depending on the specific cause of the issue. On average, the cost of parts for this repair can range from $50 to $200, while labor costs can range from $100 to $300. This estimate does not include additional diagnostic fees that may be incurred at an auto repair shop. It is advisable to consult with a qualified mechanic to receive an accurate cost estimate based on your vehicle's unique circumstances. Labor rates at auto repair shops typically range between $80 and $150 per hour.

What does this mean?

Tech Notes for P0650 2016 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 2016 GMC Sierra Code

1. What does the OBDII code P0650 mean on a 2016 GMC Sierra?

P0650 indicates a problem with the Malfunction Indicator Lamp (MIL) Control Circuit, which means the check engine light may not function correctly.

2. What are the common symptoms of P0650 in a 2016 GMC Sierra?

The most common symptom is that the check engine light does not illuminate when there’s an issue. In some cases, the light may stay on or flicker.

3. What causes the P0650 code to appear in a 2016 GMC Sierra?

Common causes include a burned-out MIL bulb, a faulty MIL circuit, damaged wiring or connectors, or a malfunctioning engine control module (ECM).

4. Can I drive my 2016 GMC Sierra with a P0650 code?

Yes, but it’s not recommended. If the check engine light isn’t working properly, you may not be alerted to other critical engine or emission system issues.

5. How do I diagnose the P0650 code on a 2016 GMC Sierra?

Inspect the MIL bulb, check for damaged wiring or connectors in the MIL circuit, and test the ECM for faults if no wiring issues are found.

6. How do I fix the P0650 code on a 2016 GMC Sierra?

Repairs may include replacing a blown MIL bulb, repairing or replacing damaged wiring or connectors, or replacing the ECM if it’s determined to be faulty.

7. Can a blown fuse cause the P0650 code in a 2016 GMC Sierra?

Yes, a blown fuse in the instrument cluster or ECM circuit can disrupt the MIL and trigger the code.

8. How much does it cost to repair a P0650 code in a 2016 GMC Sierra?

Costs vary depending on the issue. Replacing a bulb may cost $50-$100, while ECM replacement could exceed $1,000 including labor.

9. Can a P0650 code cause other problems in a 2016 GMC Sierra?

The code itself doesn’t cause performance issues, but it prevents the check engine light from alerting you to other potential problems.

10. Is P0650 a common issue in the 2016 GMC Sierra?

It’s relatively uncommon, but it can occur due to wiring wear, faulty components, or manufacturing defects in the MIL circuit.

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