AutoCodes – Generic – U3012

U3012 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 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 16,698

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 Aug 09, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U3012 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 - Control Module Improper Wake-Up Performance - AutoCodes.com — U3012 Code - Control Module Improper Wake-Up Performance

What does this mean?

What are the Possible Causes of the DTC U3012?

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?

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 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 code?

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

Need Help with the Code?

Get the U3012 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U3012 Buick — Control Module Improper Wake-Up Performance
U3012 Cadillac — Control Module Improper Wake-Up Performance
U3012 Chevrolet — Control Module Improper Wake-Up Performance
U3012 GMC — Control Module Improper Wake-Up Performance

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 Code

1. What are the common symptoms of OBDII code U3012 (Control Module Improper Wake-Up Performance)?

- Common symptoms include intermittent starting issues, poor engine performance, and warning lights illuminated on the dashboard.

2. What are the possible causes of OBDII code U3012?

- The code U3012 can be caused by a weak battery, faulty control module, wiring issues, or software glitches in the vehicle's electronic system.

3. How can I diagnose OBDII code U3012?

- Diagnosing the code typically involves using a professional OBDII scanner to read the fault codes, checking the battery health, inspecting the control module connections, and testing the wiring for any faults.

4. Can a weak battery cause OBDII code U3012 to appear?

- Yes, a weak or failing battery can trigger the U3012 code due to insufficient power for the control modules to wake up properly.

5. How can I repair OBDII code U3012?

- Repair options may include replacing the battery if it is weak, repairing or replacing the faulty control module, checking and fixing any damaged wiring, and updating the software in the affected modules.

6. Is it safe to continue driving with OBDII code U3012 present?

- It is generally not recommended to drive with this code present, as it can lead to further electrical issues and potential safety concerns while driving.

7. Can a DIY enthusiast fix OBDII code U3012 at home?

- Depending on the underlying cause, some DIY enthusiasts may be able to address the issue by replacing the battery, checking connections, and inspecting wiring. However, complex repairs may require professional assistance.

8. Will resetting the fault codes make OBDII code U3012 disappear permanently?

- Resetting the fault codes may temporarily clear the code, but if the underlying issue causing U3012 is not addressed, the code is likely to reappear.

9. How long does it typically take to repair OBDII code U3012?

- The repair time for U3012 can vary depending on the cause and complexity of the issue. Simple fixes like replacing a battery can be done quickly, while diagnosing and repairing control module issues may take longer.

10. Can extreme weather conditions contribute to triggering OBDII code U3012?

- Yes, extreme temperatures or weather conditions can sometimes exacerbate underlying issues related to power supply, control module performance, and electrical connections, leading to the appearance of code U3012.