AutoCodes – Generic – U0053

U0053 Code - Vehicle Communication Bus 'C' (-) High

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: U0053 indicates Vehicle Communication Bus 'C' (-) High.
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 2,857

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 U0053 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 U0053 - Vehicle Communication Bus 'C' (-) High - AutoCodes.com — U0053 Code - Vehicle Communication Bus 'C' (-) High

What does this mean?

What are the Possible Causes of the DTC U0053?

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 U0053?

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 U0053 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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Need Help with the Code?

Get the U0053 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 U0053 Code

1. What are common symptoms of OBDII code U0053 (Vehicle Communication Bus 'C' (-) High)?

- Common symptoms include issues with communication between control modules, dashboard warning lights, and in some cases, vehicle stalling or starting problems.

2. What are possible causes of OBDII code U0053?

- Possible causes can include damaged wiring or connectors in the communication bus 'C' circuit, faults in control modules, issues with the power and ground connections, or a malfunctioning CAN bus network.

3. How can I diagnose OBDII code U0053?

- Diagnosis involves using a professional OBDII scanner to retrieve the code, inspecting the wiring and connectors in the communication bus 'C' circuit, checking the control modules for faults, and verifying the power and ground connections.

4. Can I still drive my vehicle with OBDII code U0053 present?

- It is not recommended to drive the vehicle with this code present, as it may lead to further communication issues between control modules and potentially affect the performance and safety of the vehicle.

5. How can I repair OBDII code U0053?

- Repairing this code involves locating and repairing any damaged wiring or connectors in the communication bus 'C' circuit, addressing any faults in control modules, ensuring proper power and ground connections, and clearing the code with a professional OBDII scanner.

6. Are there any DIY tips for fixing OBDII code U0053?

- DIY tips include visually inspecting wiring and connectors for any visible damage, checking fuses related to the communication bus 'C' circuit, and ensuring all connections are secure and free of corrosion.

7. Will OBDII code U0053 cause my vehicle to fail an emissions test?

- Yes, the presence of this code may cause your vehicle to fail an emissions test due to the potential impact on the communication between control modules and the overall performance of the vehicle.

8. How do I prevent OBDII code U0053 from reoccurring?

- To prevent this code from reoccurring, it is important to address any underlying issues promptly, perform regular maintenance checks on the vehicle's electrical system, and ensure all connections are secure and functioning properly.

9. Can a mechanic help me fix OBDII code U0053?

- Yes, a qualified mechanic can help diagnose and repair OBDII code U0053 by conducting a thorough inspection of the vehicle's communication system, identifying the root cause of the issue, and performing the necessary repairs.

10. Is OBDII code U0053 a serious issue?

- OBDII code U0053 should be taken seriously as it can lead to communication problems between control modules, affecting the overall functionality and safety of the vehicle. It is recommended to address this code promptly to prevent any further issues.