AutoCodes – Generic – U0064

U0064 Code - Vehicle Communication Bus 'E'

Quick Answer

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Common causes include Diagnosis of this Diagnostic Trouble Code (DTC) is accomplished via the vehicle symptom(s), Check for more codes, Faulty Control Module. 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: U0064 indicates Vehicle Communication Bus 'E'.
Common causes: Common causes include Diagnosis of this Diagnostic Trouble Code (DTC) is accomplished via the vehicle symptom(s), Check for more codes, Faulty Control Module.
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 9,165

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 Mar 29, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0064 Description

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Operating information and commands are exchanged among the devices. The devices have programmed information about what messages are needed to be exchanged on the serial data circuits. CAN bus uses two dedicated wires for communication. The wires are called CAN high and CAN low. When the CAN bus is in idle mode, both lines carry 2.5V. When data bits are being transmitted, the CAN high line goes to 3.75V, and the CAN low drops to 1.25V, thereby generating a 2.5V differential between the lines. Since communication relies on a voltage differential between the two bus lines, the CAN bus is NOT sensitive to inductive spikes, electrical fields, or other noise. The Diagnostic Trouble Code (DTC) sets when a supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U0064 - Vehicle Communication Bus 'E' - AutoCodes.com — U0064 Code - Vehicle Communication Bus 'E'

What does this mean?

What are the Possible Causes of the DTC U0064?

Diagnosis of this Diagnostic Trouble Code (DTC) is accomplished via the vehicle symptom(s)
Check for more codes
Faulty Control Module
Control Module harness is open or shorted
Control Module circuit poor electrical connection

How to Fix the DTC U0064?

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 U0064 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 U0064 code?

Need more information on how to fix the U0064 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0064 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 U0064 Code

1. What are the common symptoms associated with OBDII code U0064?

The common symptoms include communication issues between various control modules in the vehicle, intermittent or complete loss of communication with the affected module, and warning lights illuminated on the dashboard.

2. What are the possible causes of OBDII code U0064?

Possible causes include a faulty communication bus 'E', damaged wiring or connectors in the communication network, software issues within the affected module, or a malfunctioning control module.

3. How can I diagnose the OBDII code U0064?

Diagnosing this code typically involves using a professional OBDII scanner to retrieve the specific details of the code, checking for any related trouble codes in other modules, and conducting a thorough inspection of the communication network components.

4. What are some repair tips for resolving OBDII code U0064?

Repair tips may include inspecting and repairing any damaged wiring or connectors, ensuring proper power and ground connections to the affected module, updating software as required, and replacing the faulty control module if necessary.

5. Can OBDII code U0064 be fixed without professional help?

While some basic troubleshooting steps can be taken by DIY enthusiasts, resolving this code often requires advanced diagnostic tools and technical expertise. Seeking professional help from a certified mechanic or dealership is recommended for an accurate diagnosis and repair.

6. Is it safe to drive with OBDII code U0064 present?

It is generally not recommended to drive the vehicle with unresolved communication bus issues, as it can affect the performance, safety systems, and overall functionality of the vehicle. It's best to address the issue promptly to prevent any potential risks.

7. How much does it typically cost to repair OBDII code U0064?

The cost of repairing this code can vary depending on the specific cause of the issue, the extent of the repairs needed, and the labor rates of the service provider. It's advisable to obtain multiple quotes for an accurate estimate.

8. Can a low battery voltage cause OBDII code U0064 to appear?

Yes, a low battery voltage or electrical issues can potentially trigger communication errors and result in the U0064 code appearing. It's essential to ensure the battery and electrical system are in good condition when diagnosing this code.

9. Are there any recalls related to OBDII code U0064?

Recalls related to this specific code may vary depending on the vehicle make and model. Checking with the manufacturer or visiting the National Highway Traffic Safety Administration (NHTSA) website can provide information on any relevant recalls.

10. How can I prevent OBDII code U0064 from recurring in the future?

Regular maintenance, including checking and maintaining the vehicle's electrical system, avoiding water damage to wiring and connectors, and promptly addressing any warning signs of communication issues, can help prevent the recurrence of this code.