AutoCodes – Generic – U2012

U2012 Code - Communication Bus Error

Quick Answer

The Diagnostic Trouble Code (DTC) will set when the Dynamic Stability Control Module (DSCM) has detected a communication bus error. Common causes include Faulty Dynamic Stability Control Module (DSCM), Dynamic Stability Control Module harness is open or shorted, Dynamic Stability 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: U2012 indicates Communication Bus Error.
Common causes: Common causes include Faulty Dynamic Stability Control Module (DSCM), Dynamic Stability Control Module harness is open or shorted, Dynamic Stability 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 18,949

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 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U2012 Description

The Diagnostic Trouble Code (DTC) will set when the Dynamic Stability Control Module (DSCM) has detected a communication bus error.

OBDII Code U2012 - Communication Bus Error - AutoCodes.com — U2012 Code - Communication Bus Error

What does this mean?

What are the Possible Causes of the DTC U2012?

Faulty Dynamic Stability Control Module (DSCM)
Dynamic Stability Control Module harness is open or shorted
Dynamic Stability Control Module circuit poor electrical connection

How to Fix the DTC U2012?

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 U2012 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 U2012 code?

Need more information on how to fix the U2012 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U2012 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U2012 Ford — Communication Bus Error
U2012 Jaguar — Communication Bus Error
U2012 Lincoln — Communication Bus Error
U2012 Mercury — Communication Bus Error

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 U2012 Code

1. What is OBDII code U2012 (Communication Bus Error)?

The U2012 code indicates a communication bus error within the vehicle's network, typically affecting modules such as the powertrain control module (PCM) and body control module (BCM).

2. What are common symptoms of a U2012 code?

Common symptoms of a U2012 code may include intermittent or total loss of communication with various modules, dashboard warning lights, erratic behavior of vehicle systems, and potential drivability issues.

3. What are possible causes of a U2012 code?

Causes of a U2012 code can include damaged wiring or connectors in the communication network, faulty modules, software glitches, low battery voltage, or water damage to the vehicle's electronics.

4. How is a U2012 code diagnosed?

Diagnosing a U2012 code typically involves using a scan tool to communicate with the affected modules, checking for other related trouble codes, inspecting wiring and connectors for damage, and performing communication tests to pinpoint the issue.

5. How can a U2012 code be repaired?

Repairing a U2012 code may involve repairing or replacing damaged wiring or connectors, reprogramming modules if necessary, checking and resolving any battery voltage issues, and ensuring all modules are communicating properly within the network.

6. Can a U2012 code be fixed at home?

Fixing a U2012 code at home may be possible for those with the necessary diagnostic tools and technical knowledge. However, due to the complexity of communication bus errors, it is recommended to seek professional help if unsure.

7. Is it safe to continue driving with a U2012 code?

Driving with a U2012 code is not recommended as it can lead to potential safety hazards or further damage to the vehicle's systems. It is best to address the issue promptly to avoid any complications.

8. How much does it cost to repair a U2012 code?

The cost of repairing a U2012 code can vary depending on the underlying cause, parts needed for replacement, labor costs, and whether the repair is done at a dealership or an independent repair shop. It is advisable to obtain quotes from different sources.

9. Can a U2012 code be related to other issues in the vehicle?

Yes, a U2012 code can be related to other issues in the vehicle, especially if it affects critical modules like the PCM or BCM. Addressing the U2012 code promptly can help prevent further complications in the vehicle's systems.

10. How can I prevent a U2012 code from occurring?

To prevent a U2012 code, it is important to maintain the vehicle's electrical system, avoid water damage to electronic components, perform regular vehicle inspections, and address any communication issues promptly to prevent them from escalating.