AutoCodes – Generic – U135A

U135A Code - Lost Communication With Shift To Park Range Actuator

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: U135A indicates Lost Communication With Shift To Park Range Actuator.
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.

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Code Popularity 2,263

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
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Code U135A 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 U135A - Lost Communication With Shift To Park Range Actuator - AutoCodes.com — U135A Code - Lost Communication With Shift To Park Range Actuator

What does this mean?

What are the Possible Causes of the DTC U135A?

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 U135A?

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 U135A 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 U135A code?

Need more information on how to fix the U135A code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U135A code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U135A Buick — Lost Communication With Shift To Park Range Actuator
U135A Cadillac — Lost Communication With Shift To Park Range Actuator
U135A Chevrolet — Lost Communication With Shift To Park Range Actuator
U135A GMC — Lost Communication With Shift To Park Range Actuator

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 U135A Code

1. What does the OBDII code U135A mean?

The U135A code indicates a communication failure between the vehicle's control modules and the Shift to Park range actuator.

2. What are common symptoms of the U135A code?

Symptoms include the vehicle not recognizing it is in "Park," inability to turn off the engine, warning lights on the dashboard, and possible battery drain.

3. What causes the U135A code to appear?

This code is typically caused by faulty wiring, a defective Shift to Park actuator, a malfunctioning control module, or poor electrical connections.

4. Can I still drive my car with the U135A code?

Driving may be possible, but unresolved issues could prevent the vehicle from recognizing "Park," leading to safety concerns and further damage.

5. How is the U135A code diagnosed?

A technician will use a scan tool to read the code, inspect the wiring and connectors, and test the Shift to Park actuator for proper operation.

6. How can the U135A code be fixed?

Repairs typically involve replacing the Shift to Park actuator, repairing damaged wiring, or updating/reprogramming the vehicleâ€™s control modules.

7. What vehicles are prone to the U135A code?

This code is commonly reported in GM vehicles, including Chevrolet, GMC, and Cadillac models, but it can occur in others as well.

8. How much does it cost to repair the U135A code?

The repair cost depends on the issue but can range from $100 for wiring repairs to $500 or more if the actuator or control module needs replacement.

9. Can I reset the U135A code without fixing the issue?

While you can clear the code temporarily, it will likely return if the underlying problem is not resolved.

10. How can I prevent the U135A code from recurring?

Regular maintenance, inspecting wiring for damage, and ensuring proper software updates for control modules can help prevent this code from reappearing.