AutoCodes – GMC – P263B 2014 GMC Sierra

P263B 2014 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 2014 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 185

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 2014 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 2014 GMC Sierra - Malfunction Indicator Lamp Control Circuit High Voltage - AutoCodes.com — P263B 2014 GMC Sierra Code - Malfunction Indicator Lamp Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P263B 2014 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 2014 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 2014 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 2014 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 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code P263B in a 2014 GMC Sierra?

- The common symptoms include the illumination of the Malfunction Indicator Lamp (MIL) or Check Engine Light on the dashboard.

2. What does the OBDII code P263B for a 2014 GMC Sierra indicate?

- The code P263B specifically refers to a malfunction in the Malfunction Indicator Lamp Control Circuit due to high voltage.

3. What are the possible causes of OBDII code P263B in a 2014 GMC Sierra?

- Potential causes of this code can include a faulty Malfunction Indicator Lamp (MIL) control module, damaged wiring in the control circuit, or a malfunctioning PCM (Powertrain Control Module).

4. How serious is the OBDII code P263B in a 2014 GMC Sierra?

- While the vehicle may still be operable, it is important to address this issue promptly to ensure the proper functioning of the Malfunction Indicator Lamp and to prevent any potential long-term problems.

5. Can I continue driving my 2014 GMC Sierra with the OBDII code P263B present?

- It is generally safe to drive the vehicle with this code, but it is recommended to have the issue diagnosed and repaired as soon as possible to avoid any further complications.

6. How can I diagnose the OBDII code P263B in my 2014 GMC Sierra?

- Diagnosing this code typically involves using an OBDII scanner to retrieve the specific fault codes, checking the wiring and connections related to the Malfunction Indicator Lamp control circuit, and testing the components involved.

7. How can I repair OBDII code P263B in a 2014 GMC Sierra?

- Repairing this code may involve replacing the Malfunction Indicator Lamp control module, repairing or replacing damaged wiring, or reprogramming the PCM if necessary.

8. Can I reset the OBDII code P263B in my 2014 GMC Sierra with a simple reset tool?

- While resetting the code may temporarily turn off the Malfunction Indicator Lamp, it is important to address the underlying issue causing the code to prevent it from reoccurring.

9. Is it necessary to take my 2014 GMC Sierra to a mechanic for OBDII code P263B repair?

- While some DIY enthusiasts may be able to diagnose and repair this code themselves, it is recommended to seek professional help, especially if you are not familiar with automotive electrical systems.

10. How much does it typically cost to repair OBDII code P263B in a 2014 GMC Sierra?

- The cost of repairing this code can vary depending on the specific cause of the issue, but it may range from a few hundred dollars for parts and labor to address the Malfunction Indicator Lamp control circuit problem.