AutoCodes – GMC – P263B 2016 GMC Sierra

P263B 2016 GMC Sierra Code - Malfunction Indicator Lamp Control Circuit High Voltage

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: P263B 2016 GMC Sierra indicates Malfunction Indicator Lamp Control Circuit High Voltage.
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 181

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
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P263B 2016 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 high voltage on the MIL control circuit during the driver ON state. This indicates a shorted to voltage MIL control circuit.

OBDII Code P263B 2016 GMC Sierra - Malfunction Indicator Lamp Control Circuit High Voltage - AutoCodes.com — P263B 2016 GMC Sierra Code - Malfunction Indicator Lamp Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P263B 2016 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 P263B 2016 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 P263B 2016 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.

Need more information about the P263B 2016 GMC Sierra code?

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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 P263B 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code P263B in a 2016 GMC Sierra?

The common symptoms of code P263B include the illumination of the malfunction indicator lamp (MIL) or check engine light on the dashboard.

2. What does the OBDII code P263B "Malfunction Indicator Lamp Control Circuit High Voltage" mean for a 2016 GMC Sierra?

This code indicates a problem with the control circuit of the malfunction indicator lamp (MIL) in the vehicle, specifically a high voltage issue.

3. What are the possible causes of OBDII code P263B in a 2016 GMC Sierra?

Possible causes of code P263B include a faulty malfunction indicator lamp (MIL), issues with the wiring or connectors in the control circuit, or a problem with the powertrain control module (PCM).

4. How serious is the OBDII code P263B in a 2016 GMC Sierra?

While this code may not cause immediate drivability issues, it is important to address it promptly to ensure the proper functioning of the MIL and to prevent potential future problems.

5. Can I continue to drive my 2016 GMC Sierra with OBDII code P263B?

It is generally safe to continue driving your vehicle with this code, but it is recommended to have it diagnosed and repaired as soon as possible to prevent any underlying issues from worsening.

6. How can I diagnose OBDII code P263B in my 2016 GMC Sierra?

Diagnosing this code typically involves using an OBDII scanner to retrieve the specific trouble code, checking the wiring and connectors in the MIL control circuit, and testing the functionality of the MIL itself.

7. Is it possible to reset OBDII code P263B in a 2016 GMC Sierra?

While you can clear the code using an OBDII scanner, it is crucial to address the underlying issue causing the code to prevent it from reoccurring.

8. What are some repair tips for fixing OBDII code P263B in a 2016 GMC Sierra?

Repair tips for this code may include inspecting and repairing any damaged wiring or connectors in the MIL control circuit, replacing a faulty MIL, or addressing any issues with the PCM.

9. How much does it cost to fix OBDII code P263B in a 2016 GMC Sierra?

The cost of fixing this code can vary depending on the underlying cause and the necessary repairs. It is recommended to consult a professional mechanic for an accurate diagnosis and cost estimate.

10. Can OBDII code P263B in a 2016 GMC Sierra cause other problems if left untreated?

While this code may not directly cause drivability issues, leaving it untreated could lead to potential issues with the vehicle's emission system or other related components. It is best to address the problem promptly to prevent further complications.