AutoCodes – GMC – P0650 2017 GMC Sierra

P0650 2017 GMC Sierra Code - Malfunction Indicator Lamp Control Circuit

Quick Answer

The Malfunction Indicator Lamp (MIL) illuminates to inform the driver that an emission system fault has occurred, and the powertrain control system requires service. Common causes include Faulty Instrument Cluster, Instrument Cluster harness is open or shorted, Instrument Cluster 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: P0650 2017 GMC Sierra indicates Malfunction Indicator Lamp Control Circuit.
Common causes: Common causes include Faulty Instrument Cluster, Instrument Cluster harness is open or shorted, Instrument Cluster 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 340

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 Jul 18, 2022

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0650 2017 GMC Sierra Description

The Malfunction Indicator Lamp (MIL) illuminates to inform the driver that an emission system fault has occurred, and the powertrain control system requires service. Ignition voltage is supplied directly to the MIL. The Engine Control Module (ECM) turns the MIL ON by grounding the MIL control circuit when the emission system fault occurs. Under normal operating conditions, the MIL should be ON only when the ignition is ON, and the engine is OFF. The Diagnostic Trouble Code (DTC) will be set when the ECM detects low voltage during the MIL control circuit driver OFF state. This indicates either a shorted to ground or an open MIL control circuit.

OBDII Code P0650 2017 GMC Sierra - Malfunction Indicator Lamp Control Circuit - AutoCodes.com — P0650 2017 GMC Sierra Code - Malfunction Indicator Lamp Control Circuit

What does this mean?

What are the Possible Causes of the DTC P0650 2017 GMC Sierra?

Faulty Instrument Cluster
Instrument Cluster harness is open or shorted
Instrument Cluster circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0650 2017 GMC Sierra?

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

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0650 2017 GMC Sierra 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.

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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 2017 GMC Sierra Code

1. What does the OBDII code P0650 mean on a 2017 GMC Sierra?

P0650 indicates an issue with the Malfunction Indicator Lamp (MIL) Control Circuit, which may prevent the check engine light from functioning properly.

2. What are the common symptoms of code P0650?

The most common symptom is that the check engine light does not illuminate during startup or when a fault is detected in the system.

3. What causes the P0650 code to appear?

Common causes include a faulty MIL bulb, damaged wiring or connectors in the MIL circuit, a malfunctioning instrument cluster, or a problem with the Powertrain Control Module (PCM).

4. Can I drive my 2017 GMC Sierra with the P0650 code active?

While the vehicle may still run, the P0650 code could prevent you from being alerted to other engine or emissions-related issues. Itâ€™s recommended to address the issue promptly.

5. How do I diagnose the P0650 code?

Start by checking the MIL bulb for functionality, inspecting the wiring and connectors in the circuit for damage, and testing the instrument cluster and PCM for faults.

6. What tools are needed to fix the P0650 code?

You may need a diagnostic scan tool, a multimeter for electrical testing, and possibly specialized tools for accessing the instrument cluster.

7. How much does it cost to repair the P0650 code on a GMC Sierra?

The cost depends on the root cause. Replacing a MIL bulb might cost less than $50, while repairing the instrument cluster or PCM could range from $300 to $1,000.

8. Can a blown fuse cause the P0650 code?

Yes, a blown fuse in the MIL circuit can cause the P0650 code. Check your fuse box for any blown fuses and replace them if necessary.

9. Does the P0650 code affect emissions testing?

Yes, since the MIL may not function correctly, it could cause your vehicle to fail an emissions test, as the check engine light is required to operate as designed.

10. Do I need to replace the PCM if I get a P0650 code?

Not necessarily. The PCM is rarely the primary cause. Rule out simpler issues like a faulty bulb, damaged wiring, or a malfunctioning instrument cluster before considering PCM replacement.