AutoCodes – Chevrolet – U2135 Chevrolet

U2135 Chevrolet Code - Lost Communication With Rear Integration Module

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Rear Integration Module (RIM), Rear Integration Module harness is open or shorted, Rear Integration 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: U2135 Chevrolet indicates Lost Communication With Rear Integration Module.
Common causes: Common causes include Faulty Rear Integration Module (RIM), Rear Integration Module harness is open or shorted, Rear Integration 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 623

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 16, 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 U2135 Chevrolet Description

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices. The devices have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver device as an availability indication of the transmitter device. Each message contains the identification number of the transmitter device. A loss of serial data communications Diagnostic Trouble Code (DTC) does not represent a failure of the devices that contain the stored code. The DTC will set when a supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U2135 Chevrolet - Lost Communication With Rear Integration Module - AutoCodes.com — U2135 Chevrolet Code - Lost Communication With Rear Integration Module

What does this mean?

What are the Possible Causes of the DTC U2135 Chevrolet?

Faulty Rear Integration Module (RIM)
Rear Integration Module harness is open or shorted
Rear Integration Module circuit poor electrical connection

How to Fix the DTC U2135 Chevrolet?

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 U2135 Chevrolet 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 U2135 Chevrolet code?

Need more information on how to fix the U2135 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U2135 Chevrolet 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 U2135 Chevrolet Code

1. What are the common symptoms of OBDII code U2135 in a Chevrolet related to the loss of communication with the Rear Integration Module?

- Common symptoms include non-functioning rear lights, issues with the rear windshield wiper, and failure of rear electrical components.

2. What are some possible causes of the U2135 code in a Chevrolet indicating a communication problem with the Rear Integration Module?

- Potential causes include a faulty rear integration module, damaged wiring or connectors, a blown fuse, or a software glitch in the vehicle's system.

3. How can I diagnose the U2135 code in a Chevrolet to pinpoint the issue with the Rear Integration Module?

- Diagnosis involves using a diagnostic scanner to retrieve the trouble codes, checking the rear integration module for power and ground connections, inspecting wiring for damage, and testing communication signals.

4. Is it safe to continue driving my Chevrolet with the U2135 code indicating a communication failure with the Rear Integration Module?

- It is not recommended to drive the vehicle with this code present, as it may lead to safety hazards due to non-functioning rear lights or other electrical components.

5. Can the U2135 code be cleared/reset in a Chevrolet to see if it reoccurs, or does it require immediate repair?

- Clearing the code may temporarily resolve the issue, but if the problem persists and the code returns, it indicates an ongoing problem that needs to be addressed promptly.

6. Are there any DIY repair tips for fixing the U2135 code related to lost communication with the Rear Integration Module in a Chevrolet?

- DIY repair options include checking and cleaning the module connectors, inspecting and repairing damaged wiring, and ensuring all fuses related to the rear integration module are intact.

7. What are the potential repair options for resolving the U2135 code in a Chevrolet caused by communication issues with the Rear Integration Module?

- Repair options may include replacing the rear integration module, repairing damaged wiring or connectors, resetting the module software, or seeking professional assistance for further diagnosis and repair.

8. How much does it typically cost to repair the U2135 code in a Chevrolet due to the lost communication with the Rear Integration Module?

- The cost of repair can vary depending on the specific cause of the issue, but it may range from a few hundred to a thousand dollars, including parts and labor.

9. Can a faulty battery or alternator cause the U2135 code to appear in a Chevrolet, signaling a communication problem with the Rear Integration Module?

- While a weak battery or alternator may affect overall vehicle electrical systems, they are unlikely to directly trigger the U2135 code. It is more commonly related to specific module or wiring issues.

10. Is it advisable to seek professional help from a certified mechanic or dealership for diagnosing and repairing the U2135 code in a Chevrolet with communication problems with the Rear Integration Module?

- Yes, it is recommended to consult a qualified technician with experience in diagnosing and repairing electrical issues in vehicles, especially when dealing with complex communication problems like the U2135 code.