AutoCodes – Generic – U135E

U135E Code - Lost Communication With Transmission Control Module On Engine Control Module LIN Bus 1

Quick Answer

The Local Interconnect Network (LIN) Bus consists of a single wire with a transmission rate of 10.417 Kbit/s. Common causes include Faulty Transmission Control Module, Transmission Control Module harness is open or shorted, Transmission 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: U135E indicates Lost Communication With Transmission Control Module On Engine Control Module LIN Bus 1.
Common causes: Common causes include Faulty Transmission Control Module, Transmission Control Module harness is open or shorted, Transmission 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.

Save to My Repairs My Repairs

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

Code Popularity 1,378

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 17, 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 U135E Description

The Local Interconnect Network (LIN) Bus consists of a single wire with a transmission rate of 10.417 Kbit/s. The serial data is transmitted over a LIN circuit between a master control module and other LIN devices within a particular subsystem. If serial data communication is lost between any of the LIN devices on the LIN bus network, the master control module will set a no communication code against the non-communicating LIN device. The Diagnostic Trouble Code (DTC) sets when a supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U135E - Lost Communication With Transmission Control Module On Engine Control Module LIN Bus 1 - AutoCodes.com — U135E Code - Lost Communication With Transmission Control Module On Engine Control Module LIN Bus 1

What does this mean?

What are the Possible Causes of the DTC U135E?

Faulty Transmission Control Module
Transmission Control Module harness is open or shorted
Transmission Control Module circuit poor electrical connection

How to Fix the DTC U135E?

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 U135E 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 U135E code?

Need more information on how to fix the U135E code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U135E code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U135E Buick — Lost Communication With Transmission Control Module On Engine Control Module LIN Bus 1
U135E Cadillac — Lost Communication With Transmission Control Module On Engine Control Module LIN Bus 1
U135E Chevrolet — Lost Communication With Transmission Control Module On Engine Control Module LIN Bus 1
U135E GMC — Lost Communication With Transmission Control Module On Engine Control Module LIN Bus 1

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 U135E Code

1. What are common symptoms of OBDII code U135E?

- Common symptoms include transmission shifting issues, engine stalling, and the illumination of the check engine light.

2. What are possible causes of code U135E?

- Possible causes include a faulty transmission control module (TCM), issues with the Engine Control Module (ECM), damaged wiring or connectors, or a communication network failure.

3. How can I diagnose OBDII code U135E?

- Diagnosis typically involves using a scan tool to retrieve the code, checking for other related codes, inspecting wiring and connectors, and testing the communication network between the TCM and ECM.

4. Can I drive my vehicle with code U135E?

- It is not recommended to drive your vehicle with this code present, as it can lead to serious transmission and engine performance issues.

5. How can I repair OBDII code U135E?

- Repair options may include repairing or replacing damaged wiring or connectors, resetting the codes, reprogramming modules, or replacing the TCM or ECM if necessary.

6. Is it safe to reset the code U135E on my own?

- While you can attempt to reset the code on your own, it is important to address the underlying issue causing the code to prevent further damage to your vehicle.

7. Can a low battery voltage trigger code U135E?

- Yes, low battery voltage or electrical issues can sometimes trigger communication errors between the TCM and ECM, leading to code U135E.

8. How much does it typically cost to repair OBDII code U135E?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from a simple wiring repair to a more complex module replacement, potentially costing a few hundred to over a thousand dollars.

9. Are there any DIY tips for addressing code U135E?

- DIY tips may include checking and tightening connectors, ensuring proper battery voltage, and inspecting for visible wiring damage before seeking professional help.

10. How long does it take to repair code U135E?

- The repair time can vary depending on the complexity of the issue and the availability of parts, but it may take anywhere from a few hours to a full day at a repair shop.