AutoCodes – RAM – U11B7 RAM

U11B7 RAM Code - Lost Communication With Terrain Switch

Quick Answer

The Diagnostic Trouble Code (DTC) sets when the Cluster does not receive information from the Terrain Switch. Common causes include Faulty Terrain Switch, Terrain Switch harness is open or shorted, Terrain Switch 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: U11B7 RAM indicates Lost Communication With Terrain Switch.
Common causes: Common causes include Faulty Terrain Switch, Terrain Switch harness is open or shorted, Terrain Switch 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 506

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Apr 27, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U11B7 RAM Description

The Diagnostic Trouble Code (DTC) sets when the Cluster does not receive information from the Terrain Switch.

OBDII Code U11B7 RAM - Lost Communication With Terrain Switch - AutoCodes.com — U11B7 RAM Code - Lost Communication With Terrain Switch

What does this mean?

What are the Possible Causes of the DTC U11B7 RAM?

Faulty Terrain Switch
Terrain Switch harness is open or shorted
Terrain Switch circuit poor electrical connection

How to Fix the DTC U11B7 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 U11B7 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.

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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 U11B7 RAM Code

1. What are the common symptoms of OBDII code U11B7 RAM Lost Communication With Terrain Switch?

- Common symptoms include illumination of the check engine light, loss of functionality of the terrain switch, and potential issues with the vehicle's transmission or drivability.

2. What are the typical causes of OBDII code U11B7 RAM Lost Communication With Terrain Switch?

- The code U11B7 can be triggered by a faulty terrain switch, damaged wiring or connectors related to the terrain switch, a defective body control module (BCM), or issues with the communication network.

3. How can I diagnose the OBDII code U11B7 RAM Lost Communication With Terrain Switch?

- Diagnosis typically involves using a diagnostic scanner to retrieve the code, inspecting the terrain switch and its wiring for any visible damage, and testing the communication network between the switch, BCM, and other related components.

4. Is it safe to continue driving with the OBDII code U11B7 RAM present?

- It is generally not recommended to continue driving with the U11B7 code active, as it can lead to further electrical issues and potential drivability problems. It's best to address the underlying cause promptly.

5. What are some repair tips for addressing OBDII code U11B7 RAM Lost Communication With Terrain Switch?

- Repair tips may include checking and repairing any damaged wiring or connectors, replacing the terrain switch if necessary, and reprogramming or replacing the BCM if it is found to be faulty.

6. Can OBDII code U11B7 RAM be a false alarm?

- While rare, false alarms for code U11B7 can occur due to intermittent electrical issues or temporary communication glitches. It's recommended to verify the issue through thorough diagnosis before proceeding with repairs.

7. How much does it typically cost to repair OBDII code U11B7 RAM Lost Communication With Terrain Switch?

- Repair costs can vary depending on the exact cause of the issue, labor rates, and the need for replacement parts. It's advisable to consult with a professional mechanic for an accurate estimate.

8. Can I reset the OBDII code U11B7 RAM myself?

- While you can clear the code using an OBDII scanner, it's crucial to address the underlying cause to prevent the code from reoccurring. Simply clearing the code without fixing the issue may lead to further problems.

9. Will OBDII code U11B7 RAM affect my vehicle's performance?

- The U11B7 code itself may not directly affect performance, but underlying issues related to the terrain switch and communication network can lead to drivability issues, transmission problems, or other performance concerns.

10. How can I prevent OBDII code U11B7 RAM Lost Communication With Terrain Switch in the future?

- To prevent the reoccurrence of the U11B7 code, it's essential to maintain the terrain switch and related components, address any wiring issues promptly, and conduct regular vehicle inspections to catch potential problems early.