AutoCodes – RAM – U1212 RAM

U1212 RAM Code - Lost Communication With Ultrasonic Alarm Module Missing Message

Quick Answer

The Diagnostic Trouble Code (DTC) sets when the Body Control Module (BCM) does not receive information from the Ultrasonic Alarm Module (UAM). Common causes include Faulty Ultrasonic Alarm Module (UAM), Ultrasonic Alarm Module harness is open or shorted, Ultrasonic Alarm 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: U1212 RAM indicates Lost Communication With Ultrasonic Alarm Module Missing Message.
Common causes: Common causes include Faulty Ultrasonic Alarm Module (UAM), Ultrasonic Alarm Module harness is open or shorted, Ultrasonic Alarm 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 552

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 May 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code U1212 RAM Description

The Diagnostic Trouble Code (DTC) sets when the Body Control Module (BCM) does not receive information from the Ultrasonic Alarm Module (UAM).

OBDII Code U1212 RAM - Lost Communication With Ultrasonic Alarm Module Missing Message - AutoCodes.com — U1212 RAM Code - Lost Communication With Ultrasonic Alarm Module Missing Message

What does this mean?

What are the Possible Causes of the DTC U1212 RAM?

Faulty Ultrasonic Alarm Module (UAM)
Ultrasonic Alarm Module harness is open or shorted
Ultrasonic Alarm Module circuit poor electrical connection

How to Fix the DTC U1212 RAM?

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 U1212 RAM 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 U1212 RAM code?

Need more information on how to fix the U1212 RAM code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1212 RAM code diagnosed by a professional: Find a repair shop in your area

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 U1212 RAM Code

1. What does the OBD-II code U1212 mean on a RAM vehicle?

U1212 indicates a "Lost Communication With Ultrasonic Alarm Module Missing Message," meaning the vehicle's control modules cannot communicate with the ultrasonic alarm module.

2. What are the common symptoms of the U1212 code?

Common symptoms include a malfunctioning alarm system, security warnings on the dashboard, or no noticeable symptoms in some cases.

3. What causes the U1212 code to appear?

The code can be triggered by a faulty ultrasonic alarm module, damaged wiring or connectors, a blown fuse, or issues with the communication network (CAN bus).

4. Can the U1212 code affect vehicle performance?

No, U1212 typically does not affect vehicle performance but may compromise the functionality of the alarm or security system.

5. How do I diagnose the U1212 code?

Start by checking the wiring and connectors for the ultrasonic alarm module, inspect the CAN bus network, and test the module itself for proper operation.

6. Can I drive my RAM with the U1212 code?

Yes, you can drive the vehicle, but the alarm system might not work correctly, leaving the vehicle vulnerable to theft.

7. How do I fix the U1212 code?

Repairs may include replacing or repairing damaged wiring, reconnecting loose connectors, or replacing the ultrasonic alarm module if it is faulty.

8. Can a software update fix the U1212 code?

In some cases, a software update or reprogramming of the module may resolve communication issues, but this depends on the specific cause.

9. How much does it cost to repair the U1212 code?

Repair costs can vary widely, from $50 for minor wiring repairs to $300 or more if the ultrasonic alarm module needs replacement.

10. Can a dead battery cause the U1212 code?

Yes, a low or dead battery can disrupt module communication and trigger the U1212 code. Ensure your battery is fully charged and functioning properly.