AutoCodes – Cadillac – U1064 Cadillac

U1064 Cadillac Code - Lost Communications With Body Control Module

Quick Answer

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Common causes include Faulty Body Control Module (BCM), Body Control Module (BCM) harness is open or shorted, Body Control Module (BCM) 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: U1064 Cadillac indicates Lost Communications With Body Control Module.
Common causes: Common causes include Faulty Body Control Module (BCM), Body Control Module (BCM) harness is open or shorted, Body Control Module (BCM) 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 3,714

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 Apr 22, 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 U1064 Cadillac Description

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the identification number of the module which sent the message for the state of health monitoring/node alive messages. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. Once an identification number is learned by a module, it will monitor for that module node alive message. Each module on the class 2 serial data circuit is required to send a Node Alive message every 2 seconds. When no message is detected from a learned identification number for 5 seconds, a Diagnostic Trouble Code (DTC) U1064 is set.

OBDII Code U1064 Cadillac - Lost Communications With Body Control Module - AutoCodes.com — U1064 Cadillac Code - Lost Communications With Body Control Module

What does this mean?

What are the Possible Causes of the DTC U1064 Cadillac?

Faulty Body Control Module (BCM)
Body Control Module (BCM) harness is open or shorted
Body Control Module (BCM) circuit poor electrical connection

How to Fix the DTC U1064 Cadillac?

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 U1064 Cadillac 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 U1064 Cadillac code?

Need more information on how to fix the U1064 Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1064 Cadillac 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 U1064 Cadillac Code

1. What are common symptoms of the U1064 Cadillac code?

- Common symptoms include malfunctioning power windows, door locks, interior lights, and other body control module-related functions.

2. What can cause the U1064 Cadillac code to appear?

- The U1064 code usually indicates a communication problem between the body control module and other modules in the vehicle, possibly due to faulty wiring, connectors, or the body control module itself.

3. How can I diagnose the U1064 Cadillac code?

- To diagnose the U1064 code, a professional diagnostic scan tool is typically needed to communicate with the vehicle's onboard computer system and identify the specific communication issue.

4. Can a bad battery or alternator cause the U1064 code?

- Yes, a weak or failing battery or alternator can potentially cause communication errors between modules, leading to the U1064 code.

5. What are some repair tips for fixing the U1064 Cadillac code?

- Repair tips may include checking and repairing any damaged wiring or connectors related to the body control module, ensuring proper grounding, and performing a module reset if necessary.

6. Is it safe to continue driving with the U1064 code present?

- It is generally not recommended to continue driving with the U1064 code present, as it may result in further electrical problems and potentially affect the overall performance of the vehicle.

7. Can the U1064 code be triggered by water damage?

- Yes, water damage to the body control module or its connectors can lead to communication issues and trigger the U1064 code.

8. How much does it typically cost to repair the U1064 Cadillac code?

- Repair costs for the U1064 code can vary depending on the underlying cause, but expenses may include diagnostic fees, parts replacement, and labor costs.

9. Are there any recalls or technical service bulletins related to the U1064 Cadillac code?

- It is recommended to check with a Cadillac dealership or online resources for any recalls or technical service bulletins specific to the U1064 code affecting your vehicle.

10. Can I reset the U1064 code myself, or do I need a professional?

- While you can attempt to clear the U1064 code using an OBDII scanner, addressing the underlying communication issue may require professional diagnostic tools and expertise.