AutoCodes – Pontiac – U1300 Pontiac

U1300 Pontiac Code - 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: U1300 Pontiac indicates 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 3,640

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 Nov 27, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code U1300 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 U1300 Pontiac - Low Voltage On Class 2 Serial Data Circuit - AutoCodes.com — U1300 Pontiac Code - Low Voltage On Class 2 Serial Data Circuit

What does this mean?

What are the Possible Causes of the DTC U1300 Pontiac?

Repair other code first

How to Fix the DTC U1300 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 U1300 code is combined with other codes, fix other codes first.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U1300 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.

Need more information about the U1300 Pontiac code?

Need more information on how to fix the U1300 Pontiac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1300 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 U1300 Pontiac Code

1. What are the common symptoms of OBDII code U1300 in a Pontiac related to low voltage on the Class 2 serial data circuit?

- Common symptoms include issues with communication between various control modules, warning lights on the dashboard, erratic gauge behavior, and loss of certain functionality such as power windows or door locks.

2. What are the possible causes of OBDII code U1300 in a Pontiac indicating low voltage on the Class 2 serial data circuit?

- Possible causes include a faulty body control module (BCM), problems with the wiring harness, loose connections, corrosion in the connectors, or a drained battery.

3. How can I diagnose the cause of OBDII code U1300 in my Pontiac indicating low voltage on the Class 2 serial data circuit?

- Diagnose by checking the battery voltage, inspecting the wiring for damage or corrosion, performing a BCM self-test, and using a scan tool to monitor communication between control modules.

4. What are some repair tips for resolving OBDII code U1300 in a Pontiac due to low voltage on the Class 2 serial data circuit?

- Repair tips include checking and repairing any damaged wiring, cleaning or replacing corroded connectors, resetting the BCM, and ensuring the battery is properly charged and functioning.

5. Can OBDII code U1300 in a Pontiac related to low voltage on the Class 2 serial data circuit be fixed without professional help?

- Depending on your experience and tools available, simple fixes like checking connections and the battery can be done at home. However, more complex issues may require professional diagnosis and repair.

6. Is it safe to continue driving my Pontiac with OBDII code U1300 indicating low voltage on the Class 2 serial data circuit?

- It is not recommended to drive the vehicle with this issue as it may lead to further electrical problems, loss of critical functions, or potential safety hazards. Seek professional help to address the problem promptly.

7. How much does it cost to repair OBDII code U1300 in a Pontiac due to low voltage on the Class 2 serial data circuit?

- The cost of repair can vary depending on the exact cause of the issue. Simple fixes like cleaning connectors may be inexpensive, while replacing a faulty BCM or repairing extensive wiring damage can be more costly.

8. Will disconnecting the battery reset OBDII code U1300 in a Pontiac caused by low voltage on the Class 2 serial data circuit?

- Disconnecting the battery may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to return once the vehicle is driven and the system detects the problem again.

9. How long does it typically take to repair OBDII code U1300 in a Pontiac related to low voltage on the Class 2 serial data circuit?

- The repair time can vary based on the specific cause of the issue and the complexity of the repair. Simple fixes may only take a short time, while more involved repairs could require several hours or days.

10. Can extreme weather conditions affect OBDII code U1300 in a Pontiac indicating low voltage on the Class 2 serial data circuit?

- Yes, extreme temperatures can sometimes exacerbate electrical issues, causing fluctuations in voltage and potentially triggering the U1300 code. It's important to address any wiring or connection problems promptly, especially in harsh weather conditions.