AutoCodes – Pontiac – U1305 Pontiac

U1305 Pontiac 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 Pontiac 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 1,929

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

What does this mean?

What are the Possible Causes of the DTC U1305 Pontiac?

Repair other code first

How to Fix the DTC U1305 Pontiac?

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

Need Help with the Code?

Get the U1305 Pontiac 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 Pontiac Code

1. What are the common symptoms of OBDII code U1305 on a Pontiac related to high or low voltage on the Class 2 serial data circuit?

The common symptoms include issues with the vehicle's communication systems, such as the radio, instrument cluster, and other electronic modules.

2. What are the possible causes of OBDII code U1305 on a Pontiac indicating high or low voltage on the Class 2 serial data circuit?

Possible causes include loose or corroded wiring connections, a faulty Class 2 serial data circuit, or a malfunctioning electronic control module.

3. How can I diagnose OBDII code U1305 on my Pontiac related to high or low voltage on the Class 2 serial data circuit?

Diagnosis involves using a diagnostic scanner to retrieve the trouble codes, checking the wiring connections for damage or corrosion, and testing the voltage on the Class 2 serial data circuit.

4. What are some repair tips for fixing OBDII code U1305 on a Pontiac due to high or low voltage on the Class 2 serial data circuit?

Repair tips include repairing any damaged wiring connections, replacing faulty electronic control modules, and ensuring all connections are secure and free of corrosion.

5. Can OBDII code U1305 on a Pontiac be reset without fixing the underlying issue of high or low voltage on the Class 2 serial data circuit?

Resetting the code without addressing the root cause may temporarily turn off the check engine light, but the issue will likely resurface until the underlying problem is fixed.

6. Are there any safety concerns associated with OBDII code U1305 on a Pontiac related to high or low voltage on the Class 2 serial data circuit?

While this code itself does not pose immediate safety risks, it can affect the proper functioning of critical vehicle systems that rely on the Class 2 serial data circuit for communication.

7. How much does it typically cost to repair OBDII code U1305 on a Pontiac due to high or low voltage on the Class 2 serial data circuit?

Repair costs can vary depending on the specific cause of the issue, but they may range from a simple wiring repair to a more involved module replacement, potentially costing several hundred dollars.

8. Can I continue driving my Pontiac with OBDII code U1305 indicating high or low voltage on the Class 2 serial data circuit?

It is not recommended to continue driving the vehicle with this issue unresolved, as it can lead to further electrical problems and potentially impact the overall performance and safety of the vehicle.

9. Is it possible to prevent OBDII code U1305 from appearing on my Pontiac in the future?

Regular maintenance, including checking and cleaning electrical connections, can help prevent issues like high or low voltage on the Class 2 serial data circuit that may trigger this code.

10. Will fixing OBDII code U1305 on my Pontiac improve fuel efficiency or performance?

While fixing this specific code may not directly impact fuel efficiency or performance, ensuring the proper functioning of the Class 2 serial data circuit can help maintain overall vehicle performance and efficiency.