AutoCodes – Chevrolet – U1305 Chevrolet

U1305 Chevrolet Code - High Or Low Voltage On Class 2 Serial Data Circuit

Quick Answer

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Common causes include Repair other code first. 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: U1305 Chevrolet indicates High Or Low Voltage On Class 2 Serial Data Circuit.
Common causes: Common causes include Repair other code first.
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 13,977

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 May 16, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code U1305 Chevrolet 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. In addition to this, Node Alive messages are transmitted by each module on the class 2 serial data circuit about once every 2 seconds. When the module detects one of the following conditions on the class 2 serial data circuit for approximately 3 seconds, the setting of all other class 2 serial communication Diagnostic Trouble Code (DTC) is inhibited and a DTC will set.

OBDII Code U1305 Chevrolet - High Or Low Voltage On Class 2 Serial Data Circuit - AutoCodes.com — U1305 Chevrolet Code - High Or Low Voltage On Class 2 Serial Data Circuit

What does this mean?

What are the Possible Causes of the DTC U1305 Chevrolet?

Repair other code first

How to Fix the DTC U1305 Chevrolet?

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

In most cases, the P1305 code is combined with other codes, fix other codes first.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U1305 Chevrolet 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 U1305 Chevrolet code?

Need more information on how to fix the U1305 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1305 Chevrolet 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 U1305 Chevrolet Code

1. What are the common symptoms of OBDII code U1305 in a Chevrolet vehicle?

- Common symptoms include intermittent or no communication with various control modules, loss of certain vehicle functions, and illumination of the check engine light.

2. What are the possible causes of OBDII code U1305 in a Chevrolet?

- Possible causes include damaged wiring in the Class 2 serial data circuit, faulty control modules, loose connections, or a malfunctioning data link connector.

3. How can I diagnose the issue related to OBDII code U1305 in my Chevrolet?

- Diagnosis typically involves using a scan tool to check for communication errors with different modules, inspecting wiring for damage, and testing the voltage levels in the Class 2 serial data circuit.

4. Are there any repair tips for fixing OBDII code U1305 in a Chevrolet?

- Repair tips may include checking and repairing any damaged wiring, ensuring all connections are secure, resetting the system by disconnecting the battery, and reprogramming control modules if necessary.

5. Can OBDII code U1305 in a Chevrolet cause any safety concerns?

- While the code itself may not pose immediate safety risks, certain vehicle functions controlled by the affected modules may be compromised, potentially impacting safety systems like airbags or anti-lock brakes.

6. Is it safe to continue driving my Chevrolet with OBDII code U1305 present?

- It is generally not recommended to drive the vehicle with unresolved OBDII codes, as it may lead to further damage or operational issues. It's best to address the underlying problem promptly.

7. How much does it typically cost to repair OBDII code U1305 in a Chevrolet?

- Repair costs can vary depending on the exact cause of the code, parts needed for replacement, and labor charges. It's advisable to consult with a mechanic or dealership for an accurate estimate.

8. Can I reset OBDII code U1305 in my Chevrolet using a simple reset tool?

- While you can attempt to clear the code using a reset tool, it's important to address the root cause of the issue to prevent the code from reoccurring.

9. Will disconnecting the battery reset OBDII code U1305 in a Chevrolet?

- Disconnecting the battery may temporarily clear the code, but it's crucial to diagnose and fix the underlying problem to prevent the code from coming back.

10. Is OBDII code U1305 exclusive to Chevrolet vehicles, or can it occur in other makes and models?

- While the specific code U1305 may be unique to Chevrolet, similar communication circuit issues can occur in other vehicle brands, often manifesting as different OBDII codes.