AutoCodes – Acura – U0073 Acura

U0073 Acura Code - Control Module Communication Bus OFF

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: U0073 Acura indicates Control Module Communication Bus OFF.
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 13,567

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
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0073 Acura 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 U0073 Acura - Control Module Communication Bus OFF - AutoCodes.com — U0073 Acura Code - Control Module Communication Bus OFF

What does this mean?

What are the Possible Causes of the DTC U0073 Acura?

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 U0073 Acura?

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 U0073 Acura 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.

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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 U0073 Acura Code

1. What are the common symptoms of the U0073 OBDII code in an Acura?

- Common symptoms include the check engine light coming on, issues with vehicle performance, and potential communication errors with various control modules.

2. What does the U0073 code mean for an Acura?

- The U0073 code indicates a communication bus off error between control modules in the vehicle, disrupting data exchange and potentially affecting vehicle operation.

3. What are some possible causes of the U0073 code in an Acura?

- Common causes include faulty wiring or connections, issues with the communication network, a defective control module, or a software glitch within the vehicle's system.

4. How can I diagnose the U0073 code in my Acura?

- To diagnose the U0073 code, a professional diagnostic scan tool is typically used to identify the specific control module experiencing communication issues and pinpoint the root cause of the problem.

5. Can I continue driving my Acura with the U0073 code present?

- While it may be possible to drive the vehicle with the U0073 code, it is not recommended as it can lead to potential performance issues and further damage to the vehicle's control systems.

6. How can I repair the U0073 code in my Acura?

- Repairing the U0073 code often involves inspecting and repairing any damaged wiring, checking and resetting control modules, and ensuring proper communication between all modules in the vehicle.

7. Will resetting the U0073 code make it go away permanently?

- Resetting the U0073 code may temporarily clear the check engine light, but if the underlying issue causing the code is not fixed, it is likely to reappear once the problem resurfaces.

8. Is the U0073 code specific to Acura vehicles only?

- No, the U0073 code is a generic OBDII code that can appear in various vehicle makes and models, indicating a similar communication bus off error between control modules.

9. Can a DIY enthusiast fix the U0073 code issue in an Acura?

- While some basic troubleshooting steps can be taken by a DIY enthusiast, diagnosing and repairing the U0073 code often requires specialized tools and expertise, making it advisable to seek professional help.

10. How much does it typically cost to repair the U0073 code in an Acura?

- The cost of repairing the U0073 code can vary depending on the specific cause of the issue, but it may involve expenses for diagnostic testing, parts replacement, and labor, potentially ranging from a few hundred to over a thousand dollars.