AutoCodes – GMC – U135B GMC

U135B GMC Code - Lost Communication With Sunload Sensor

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 Control Module Setting the Diagnostic Trouble Code (DTC), Control Module harness is open or shorted, 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: U135B GMC indicates Lost Communication With Sunload Sensor.
Common causes: Common causes include Faulty Control Module Setting the Diagnostic Trouble Code (DTC), Control Module harness is open or shorted, 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 569

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 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 U135B GMC 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 U135B GMC - Lost Communication With Sunload Sensor - AutoCodes.com — U135B GMC Code - Lost Communication With Sunload Sensor

What does this mean?

What are the Possible Causes of the DTC U135B GMC?

Faulty Control Module Setting the Diagnostic Trouble Code (DTC)
Control Module harness is open or shorted
Control Module circuit poor electrical connection

How to Fix the DTC U135B GMC?

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 U135B GMC 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 U135B GMC code?

Need more information on how to fix the U135B GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U135B GMC 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 U135B GMC Code

1. What are the common symptoms of OBDII code U135B GMC (Lost Communication With Sunload Sensor)?

- Common symptoms include issues with the automatic climate control system, inconsistent temperature readings, and malfunctioning sunload sensor functions.

2. What are some possible causes of OBDII code U135B GMC?

- Possible causes can include a faulty sunload sensor, damaged wiring or connectors related to the sunload sensor, or a communication error within the vehicle's network.

3. How can I diagnose the root cause of OBDII code U135B GMC?

- To diagnose U135B, start by checking the wiring and connectors of the sunload sensor for any damage or corrosion. Next, use a diagnostic scan tool to communicate with the sensor and verify its functionality.

4. Can I still drive my vehicle with the U135B code present?

- While it may be possible to drive with the U135B code present, it is recommended to address the issue promptly to ensure proper functioning of the climate control system and other related components.

5. How can I repair OBDII code U135B GMC?

- Repairing U135B typically involves replacing a faulty sunload sensor, repairing damaged wiring or connectors, or addressing communication errors within the vehicle's network using appropriate diagnostic tools.

6. Is it safe to reset the OBDII code U135B GMC without fixing the underlying issue?

- It is not recommended to simply reset the code without addressing the root cause, as the issue may persist and affect the proper functioning of the climate control system and sunload sensor.

7. Are there any DIY tips for troubleshooting OBDII code U135B GMC?

- DIY troubleshooting tips include visually inspecting the sunload sensor and its connections, checking for any visible damage, and using a multimeter to test the sensor's electrical signal.

8. How do I prevent OBDII code U135B GMC from recurring in the future?

- To prevent the U135B code from recurring, it is essential to ensure regular maintenance of the sunload sensor, inspect wiring and connectors for damage, and address any communication issues promptly.

9. Can extreme weather conditions affect the sunload sensor and trigger OBDII code U135B GMC?

- Yes, extreme weather conditions such as prolonged exposure to intense sunlight or extreme cold can potentially impact the performance of the sunload sensor and contribute to the U135B fault code.

10. Is it necessary to visit a dealership or mechanic to diagnose and repair OBDII code U135B GMC?

- While it is possible to diagnose and repair U135B independently, seeking assistance from a dealership or qualified mechanic may be beneficial for complex issues or if specialized diagnostic equipment is required.