AutoCodes – Buick – B1374 Buick

B1374 Buick Code - Ignition 1 Fault

Quick Answer

The Diagnostic Trouble Code (DTC) B1374 will set if IGNITION 1 input is not active after the engine has been running for 20 seconds. Common causes include Faulty Body Control Module (BCM), Body Control Module (BCM) harness is open or shorted, Body Control Module (BCM) 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: B1374 Buick indicates Ignition 1 Fault.
Common causes: Common causes include Faulty Body Control Module (BCM), Body Control Module (BCM) harness is open or shorted, Body Control Module (BCM) 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 801

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 19, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1374 Buick Description

The Diagnostic Trouble Code (DTC) B1374 will set if IGNITION 1 input is not active after the engine has been running for 20 seconds. When DTC is present, SERVICE VEHICLE SOON indicator illuminates and check gauges chime will sound. A current DTC B1374 will clear when the fault is no longer present and the ignition switch is cycled. A history DTC B1374 clears when module ignition cycle counter reaches reset threshold, without a repeat of malfunction.

OBDII Code B1374 Buick - Ignition 1 Fault - AutoCodes.com — B1374 Buick Code - Ignition 1 Fault

What does this mean?

What are the Possible Causes of the DTC B1374 Buick?

Faulty Body Control Module (BCM)
Body Control Module (BCM) harness is open or shorted
Body Control Module (BCM) circuit poor electrical connection
Faulty Instrument Panel Cluster (IPC)

How to Fix the DTC B1374 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1374 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.

Need more information about the B1374 Buick code?

Need more information on how to fix the B1374 Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1374 Buick 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 B1374 Buick Code

1. What are the common symptoms of OBDII code B1374 Buick (Ignition 1 Fault)?

- Common symptoms include engine misfiring, rough idling, stalling, and difficulty starting the vehicle.

2. What can cause the OBDII code B1374 Buick to trigger (Ignition 1 Fault)?

- The code may be triggered by issues with the ignition system, such as faulty ignition coils, spark plugs, or wiring.

3. How can I diagnose the Ignition 1 Fault related to OBDII code B1374 in my Buick?

- Use a diagnostic scanner to read the code, inspect the ignition components for any visible damage, and perform a thorough electrical system check.

4. What are some possible repair tips for fixing the Ignition 1 Fault associated with code B1374 in a Buick?

- Check and replace any faulty ignition components, such as ignition coils or spark plugs, ensure proper wiring connections, and clear the code after repairs are made.

5. Can a DIY enthusiast fix the OBDII code B1374 Buick (Ignition 1 Fault) issue?

- While some basic repairs like replacing spark plugs can be done by DIY enthusiasts, more complex issues with ignition components may require professional expertise.

6. Are there any safety precautions to consider when dealing with the Ignition 1 Fault related to OBDII code B1374 in a Buick?

- When working on the ignition system, ensure the engine is off and cool to prevent burns, and disconnect the battery to avoid electrical hazards.

7. Will driving with the OBDII code B1374 Buick (Ignition 1 Fault) cause further damage to the vehicle?

- Continuing to drive with the Ignition 1 Fault can lead to decreased engine performance, potential damage to the catalytic converter, and increased fuel consumption.

8. How important is it to address the OBDII code B1374 Buick (Ignition 1 Fault) promptly?

- It is crucial to address the issue promptly to prevent further damage to the vehicle, ensure optimal engine performance, and maintain fuel efficiency.

9. Can weather conditions affect the triggering of the OBDII code B1374 Buick (Ignition 1 Fault)?

- Extreme weather conditions, such as excessive heat or cold, can sometimes exacerbate ignition system issues and lead to the triggering of the code.

10. What is the typical cost to repair the OBDII code B1374 Buick (Ignition 1 Fault) at a professional auto repair shop?

- The cost of repairs for the Ignition 1 Fault related to code B1374 can vary depending on the exact issue, but it may range from $100 to $500 or more, including parts and labor.