AutoCodes – Buick – B1380 Buick

B1380 Buick Code - Control Module Ignition Accessory Circuit

Quick Answer

The vehicle Power Mode Master (PMM) is the Body Control Module (BCM). Common causes include Faulty Ignition Switch, Ignition Switch harness is open or shorted, Ignition Switch circuit poor electrical connection. 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: B1380 Buick indicates Control Module Ignition Accessory Circuit.
Common causes: Common causes include Faulty Ignition Switch, Ignition Switch harness is open or shorted, Ignition Switch circuit poor electrical connection.
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 8,629

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 Apr 17, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B1380 Buick Description

The vehicle Power Mode Master (PMM) is the Body Control Module (BCM). The ignition switch is a low-current switch with multiple discrete circuits to the BCM. The BCM logic uses the ignition switch positions to identify the operator's desired power mode and activate specific discrete signals, and serial data messages for the operation of different subsystems as necessary. Other modules which have switched voltage inputs may operate in a default mode if the Power Mode Master serial data message does not match what the individual module can detect from its own connections.
The Power Mode Master will activate relays and other direct outputs of the Power Mode Master as needed according to the calculated power mode. Some relays controlled by the BCM are switched ignition voltage outputs that are pass-through circuits within the BCM directly from the ignition switch. If these circuits are short to ground, the B+ circuit fuse to the ignition switch will open.

OBDII Code B1380 Buick - Control Module Ignition Accessory Circuit - AutoCodes.com — B1380 Buick Code - Control Module Ignition Accessory Circuit

What does this mean?

What are the Possible Causes of the DTC B1380 Buick?

Faulty Ignition Switch
Ignition Switch harness is open or shorted
Ignition Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B1380 Buick?

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

B1380:01 Control Module Ignition Accessory Circuit Short to Battery
B1380:04 Control Module Ignition Accessory Circuit Short to Ground or Open

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1380 Buick 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 B1380 Buick Code

1. What are the common symptoms of OBDII code B1380 in a Buick related to the Control Module Ignition Accessory Circuit?

- Common symptoms include issues with keyless entry systems, power door locks, and intermittent starting problems.

2. What are the possible causes of OBDII code B1380 in a Buick?

- Possible causes include a faulty ignition switch, damaged wiring in the ignition circuit, or a malfunctioning control module.

3. How can I diagnose the cause of OBDII code B1380 in my Buick?

- You can diagnose the issue by performing a thorough inspection of the ignition system, checking for loose connections, testing the ignition switch, and using a diagnostic scanner to retrieve fault codes.

4. What are some repair tips for addressing OBDII code B1380 in a Buick?

- Repair tips include checking and replacing any damaged wiring, repairing or replacing the ignition switch, and resetting the control module after repairs are made.

5. Can OBDII code B1380 in a Buick cause the vehicle to not start?

- Yes, if the issue is related to the Control Module Ignition Accessory Circuit, it can lead to intermittent starting problems or complete failure to start the vehicle.

6. Is it safe to continue driving my Buick with OBDII code B1380 present?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to potential starting issues or other electrical malfunctions.

7. How much does it typically cost to repair OBDII code B1380 in a Buick?

- The cost of repair can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.

8. Can I reset OBDII code B1380 in my Buick using a diagnostic scanner?

- Yes, you can use a diagnostic scanner to clear the code after completing any necessary repairs to the Control Module Ignition Accessory Circuit.

9. Is OBDII code B1380 specific to Buick vehicles only?

- OBDII code B1380 related to the Control Module Ignition Accessory Circuit can be found in various GM vehicles, including Buick models.

10. Can a DIY enthusiast repair OBDII code B1380 in a Buick at home?

- While some repairs related to this code may be suitable for DIY enthusiasts, it is recommended to have a professional mechanic diagnose and repair complex electrical issues to ensure proper resolution.