AutoCodes – GMC – U3012 2014 GMC Sierra

U3012 2014 GMC Sierra Code - Control Module Improper Wake-Up Performance

Quick Answer

The internal fault detection is handled inside the device. Common causes include Faulty Control Module setting the code, Control Module harness is open or shorted, Control Module 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: U3012 2014 GMC Sierra indicates Control Module Improper Wake-Up Performance.
Common causes: Common causes include Faulty Control Module setting the code, Control Module harness is open or shorted, Control Module 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 301

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 24, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U3012 2014 GMC Sierra Description

The internal fault detection is handled inside the device. The symptom byte information is for engineering reference only. No external circuit diagnosis is involved. The Diagnostic Trouble Code (DTC) will set when the device has detected an internal malfunction.

OBDII Code U3012 2014 GMC Sierra - Control Module Improper Wake-Up Performance - AutoCodes.com — U3012 2014 GMC Sierra Code - Control Module Improper Wake-Up Performance

What does this mean?

What are the Possible Causes of the DTC U3012 2014 GMC Sierra?

Faulty Control Module setting the code
Control Module harness is open or shorted
Control Module circuit poor electrical connection

How to Fix the DTC U3012 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U3012 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 U3012 2014 GMC Sierra code?

Need more information on how to fix the U3012 2014 GMC Sierra code? Get Access to Factory Service Manuals

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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 U3012 2014 GMC Sierra Code

1. What are common symptoms of OBDII code U3012 on a 2014 GMC Sierra?

- Common symptoms include intermittent starting issues, loss of power, and various electrical malfunctions in the vehicle.

2. What causes the OBDII code U3012 to appear on a 2014 GMC Sierra?

- The code U3012 typically indicates a problem with the control module's wake-up performance, which can be caused by a faulty control module, wiring issues, or software glitches.

3. How can I diagnose the OBDII code U3012 on my 2014 GMC Sierra?

- A thorough diagnostic scan using an OBDII scanner is recommended to pinpoint the exact cause of the U3012 code. Checking the control module connections and wiring for any visible damage is also important.

4. Can I drive my 2014 GMC Sierra with the U3012 code present?

- It is generally not recommended to drive the vehicle with the U3012 code as it may lead to further electrical problems or potential safety hazards. It is best to address the issue promptly.

5. How can I repair the Control Module Improper Wake-Up Performance issue on my 2014 GMC Sierra?

- Repairing the U3012 code may involve reprogramming the control module, replacing faulty wiring or connectors, or even replacing the control module itself. It is advisable to consult a professional mechanic for proper diagnosis and repair.

6. Are there any simple DIY fixes for the OBDII code U3012 on a 2014 GMC Sierra?

- Some DIY fixes may include checking and securing all control module connections, ensuring the battery is in good condition, and performing a software update if available. However, complex issues may require professional assistance.

7. How much does it typically cost to repair the U3012 code on a 2014 GMC Sierra?

- The cost of repairing the U3012 code can vary depending on the exact cause of the issue, the extent of the repairs needed, and the labor rates in your area. It is advisable to obtain estimates from reputable mechanics.

8. Can a faulty battery cause the U3012 code to appear on a 2014 GMC Sierra?

- Yes, a weak or faulty battery can sometimes trigger the U3012 code due to insufficient power supply to the control module during start-up. It is recommended to have the battery tested as part of the diagnostic process.

9. Will resetting the OBDII code U3012 on my 2014 GMC Sierra make it go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue causing the U3012 code is not addressed, it is likely to reappear. It is important to diagnose and fix the root cause of the problem.

10. Is the U3012 code exclusive to 2014 GMC Sierra vehicles?

- The U3012 code related to Control Module Improper Wake-Up Performance can be specific to certain GMC Sierra models, but similar codes and issues may be present in other vehicles from the same manufacturer or with similar control module systems.