AutoCodes – GMC – U2412 GMC

U2412 GMC Code - Reductant Control Module Powertrain Sensor Bus Off

Quick Answer

The high-speed General Motors Local Area Network (GMLAN) serial data circuits are serial data buses used to communicate information between the devices. Common causes include Faulty Reductant Control Module, Reductant Control Module harness is open or shorted, Reductant 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: U2412 GMC indicates Reductant Control Module Powertrain Sensor Bus Off.
Common causes: Common causes include Faulty Reductant Control Module, Reductant Control Module harness is open or shorted, Reductant 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 1,033

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 Jun 17, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U2412 GMC Description

The high-speed General Motors Local Area Network (GMLAN) serial data circuits are serial data buses used to communicate information between the devices. The high-speed GMLAN serial data circuits also connect directly to the X84 Data Link Connector (DLC) for programming purposes. If this serial data system is inoperative, some devices may still be able to communicate with the scan tool due to other serial data systems but not with each other. The device setting the Diagnostic Trouble Code (DTC) has attempted to establish communications on the high-speed GMLAN serial data circuits more than 3 times.

OBDII Code U2412 GMC - Reductant Control Module Powertrain Sensor Bus Off - AutoCodes.com — U2412 GMC Code - Reductant Control Module Powertrain Sensor Bus Off

What does this mean?

What are the Possible Causes of the DTC U2412 GMC?

Faulty Reductant Control Module
Reductant Control Module harness is open or shorted
Reductant Control Module circuit poor electrical connection

How to Fix the DTC U2412 GMC?

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 U2412 GMC 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 U2412 GMC 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 U2412 GMC Code

1. What are the common symptoms of OBDII code U2412 in a GMC vehicle?

- Common symptoms include the Check Engine light illuminating, reduced engine performance, and potential issues with the reductant control system.

2. What does the U2412 code mean in a GMC vehicle?

- The U2412 code indicates a communication issue with the reductant control module on the sensor bus, leading to a loss of communication.

3. What are the possible causes of the U2412 code in a GMC vehicle?

- Possible causes include faulty wiring or connectors, a malfunctioning reductant control module, a damaged sensor bus, or issues with the powertrain control module.

4. How can I diagnose the U2412 code in my GMC vehicle?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, checking the wiring and connectors for damage, testing the reductant control module, and inspecting the sensor bus for faults.

5. Can I drive my GMC vehicle with the U2412 code present?

- It is not recommended to drive the vehicle with the U2412 code present, as it can lead to reduced engine performance and potential damage to the reductant control system.

6. How can I repair the U2412 code in my GMC vehicle?

- Repair options may include repairing or replacing damaged wiring or connectors, replacing the reductant control module, addressing issues with the sensor bus, or reprogramming the powertrain control module.

7. Is the U2412 code a common issue in GMC vehicles?

- The U2412 code is not as common as some other OBDII codes, but it can still occur in GMC vehicles equipped with reductant control systems.

8. Can I reset the U2412 code in my GMC vehicle myself?

- While you can clear the code with an OBDII scanner, it is important to diagnose and address the underlying issue causing the code before resetting it.

9. How much does it cost to repair the U2412 code in a GMC vehicle?

- Repair costs can vary depending on the specific issue causing the code, but they may range from a few hundred to over a thousand dollars, including parts and labor.

10. Will the U2412 code cause my GMC vehicle to fail emissions testing?

- Yes, the U2412 code can cause your GMC vehicle to fail emissions testing due to issues with the reductant control system, which is essential for emissions control.