AutoCodes – Generic – C1135

C1135 Code - CAN Communication Line Or TCM

Quick Answer

ABS Actuator and Electric Unit (Control Unit) and Engine Control Module (ECM) exchange the engine signal with Control Area Network (CAN) communication line. Common causes include Faulty Engine Control Module (ECM), Faulty ABS Actuator and Electric Unit (Control Unit), Control Area Network (CAN) communication line. 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: C1135 indicates CAN Communication Line Or TCM.
Common causes: Common causes include Faulty Engine Control Module (ECM), Faulty ABS Actuator and Electric Unit (Control Unit), Control Area Network (CAN) communication line.
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 14,685

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 Aug 17, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code C1135 Description

ABS Actuator and Electric Unit (Control Unit) and Engine Control Module (ECM) exchange the engine signal with Control Area Network (CAN) communication line. Major engine components are malfunctioning.

OBDII Code C1135 - CAN Communication Line Or TCM - AutoCodes.com — C1135 Code - CAN Communication Line Or TCM

What does this mean?

What are the Possible Causes of the DTC C1135?

Faulty Engine Control Module (ECM)
Faulty ABS Actuator and Electric Unit (Control Unit)
Control Area Network (CAN) communication line
Blown Engine Control Module (ECM) fuse

How to Fix the DTC C1135?

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 does this mean?

Code Tech Notes

Control Area Network (CAN) Communication Line or Transmission Control Module (TCM). The code means that the ABS Control Module has lost or at some point lost communications with the TCM.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1135 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 C1135 code?

Need more information on how to fix the C1135 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1135 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C1135 Infiniti — CAN Communication Line Or TCM
C1135 Nissan — CAN Communication Line Or TCM

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 C1135 Code

What does OBDII code C1135 mean?

OBDII code C1135 indicates a problem with the CAN communication line or the Transmission Control Module (TCM), often signaling communication issues between the TCM and other control modules.

What are common symptoms of the C1135 code?

Common symptoms include transmission performance issues, such as erratic shifting, the check engine light illuminating, and potentially other warning lights related to the transmission.

What can cause the C1135 code to trigger?

Causes can include a faulty TCM, damaged wiring or connectors in the CAN communication line, or issues with other control modules that affect communication.

How can I diagnose the C1135 code?

Begin by scanning the vehicle with an OBDII scanner to confirm the code. Then, inspect the wiring and connectors for damage, check the TCM for proper function, and ensure all control modules are communicating properly.

What repairs are typically needed for a C1135 code?

Repairs may involve fixing or replacing damaged wiring or connectors, reprogramming or replacing the TCM, or addressing issues in other related control modules.

Can I drive my vehicle with the C1135 code?

While it may be possible to drive the vehicle, it's not recommended as it could lead to further transmission issues and potentially unsafe driving conditions.

How do I clear the C1135 code after repairs?

You can clear the code using an OBDII scanner. After repairs, erase the code and take the vehicle for a test drive to see if it returns.

Is the C1135 code specific to certain vehicle makes or models?

While the C1135 code is standardized, specific symptoms and causes may vary by make and model, so itâ€™s important to consult the vehicleâ€™s service manual for detailed information.

What should I do if the C1135 code keeps returning?

If the code persists after repairs, further diagnostic testing may be necessary to identify underlying issues, such as additional faults in the CAN communication line or a defective control module.