AutoCodes – Cadillac – U2412 Cadillac

U2412 Cadillac 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 Cadillac 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 539

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

What does this mean?

What are the Possible Causes of the DTC U2412 Cadillac?

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 Cadillac?

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 Cadillac 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.

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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 Cadillac Code

1. What are common symptoms of OBDII code U2412 in a Cadillac related to the Reductant Control Module Powertrain Sensor Bus Off?

- Common symptoms include the Malfunction Indicator Lamp (MIL) being illuminated, reduced engine performance, and potential issues with emissions control.

2. What can cause the U2412 code to appear in a Cadillac?

- The U2412 code typically appears due to a communication fault between the Reductant Control Module and the Powertrain Sensor Bus, often caused by wiring issues, a faulty control module, or a software glitch.

3. How can I diagnose the U2412 code in my Cadillac?

- Diagnosing the U2412 code involves checking the wiring harness for damage, inspecting connectors for corrosion or loose connections, and using a diagnostic scan tool to retrieve specific fault codes.

4. Can I drive my Cadillac with the U2412 code present?

- It is not recommended to drive your Cadillac with the U2412 code present, as it can lead to reduced engine performance and potential emissions control issues. It is best to address the problem promptly.

5. How can I repair the U2412 code in my Cadillac?

- Repairing the U2412 code may involve repairing or replacing damaged wiring, cleaning or replacing connectors, updating software as necessary, and potentially replacing the Reductant Control Module if deemed faulty.

6. Is the U2412 code related to the AdBlue/DEF system in my Cadillac?

- Yes, the U2412 code is related to the AdBlue/DEF system, which is responsible for reducing harmful emissions in diesel engines. The code indicates a communication issue within this system.

7. Can a DIY enthusiast fix the U2412 code issue in a Cadillac?

- While some basic diagnostics and visual inspections can be done by a DIY enthusiast, repairing the U2412 code may require advanced tools and expertise. It is recommended to consult a professional mechanic for proper diagnosis and repair.

8. Will resetting the fault codes make the U2412 code disappear temporarily?

- Resetting the fault codes may temporarily clear the U2412 code, but it is likely to reappear if the root cause of the issue is not addressed. It is crucial to diagnose and repair the underlying problem to prevent further issues.

9. How long does it typically take to repair the U2412 code in a Cadillac?

- The repair time for the U2412 code can vary depending on the exact cause of the issue and the extent of the repair needed. In some cases, it may be a quick fix, while in others, it could take several hours to diagnose and repair.

10. Can the U2412 code in a Cadillac cause the vehicle to fail emissions testing?

- Yes, if left unresolved, the U2412 code can lead to emissions control issues that may cause the vehicle to fail emissions testing. It is important to address the code promptly to ensure compliance and proper vehicle operation.