AutoCodes – Buick – B1910 Buick

B1910 Buick Code - Generator L Terminal Open Circuit

Quick Answer

Generator grounds circuit when the ignition switch is in the RUN position and engine speed is less than 400 RPM. Common causes include Faulty Generator (Alternator), Generator harness is open or shorted, Generator 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: B1910 Buick indicates Generator L Terminal Open Circuit.
Common causes: Common causes include Faulty Generator (Alternator), Generator harness is open or shorted, Generator 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 725

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 Jul 27, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1910 Buick Description

Generator grounds circuit when the ignition switch is in the RUN position and engine speed is less than 400 RPM. The Diagnostic Trouble Code (DTC) B1910 will set when the Instrument Panel Cluster (IPC) determines that engine speed is less than 400 RPM and senses a high voltage (open) in the generator.

OBDII Code B1910 Buick - Generator L Terminal Open Circuit - AutoCodes.com — B1910 Buick Code - Generator L Terminal Open Circuit

What does this mean?

What are the Possible Causes of the DTC B1910 Buick?

Faulty Generator (Alternator)
Generator harness is open or shorted
Generator circuit poor electrical connection

How to Fix the DTC B1910 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 B1910 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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Need more information on how to fix the B1910 Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1910 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 B1910 Buick Code

1. What are the common symptoms of OBDII code B1910 for Buick, indicating a Generator L Terminal Open Circuit?

- The common symptoms include the battery light on the dashboard staying illuminated, erratic electrical system behavior, and possible charging system failure.

2. What are the possible causes of the Generator L Terminal Open Circuit code B1910 in a Buick?

- The code can be triggered by a faulty generator (alternator), damaged wiring or connectors in the charging system, or a defective PCM (powertrain control module).

3. How can I diagnose the Generator L Terminal Open Circuit issue in my Buick?

- To diagnose the problem, check the wiring and connectors for any visible damage, test the generator for proper operation, and use a multimeter to check for continuity and voltage at the L terminal.

4. Can a DIY enthusiast repair the B1910 code on a Buick, or should it be done by a professional?

- While some basic troubleshooting like checking connections can be done by DIY enthusiasts, repairing or replacing components like the generator or PCM should be left to a professional mechanic.

5. Is it safe to continue driving my Buick with the B1910 code (Generator L Terminal Open Circuit) present?

- It is not recommended to continue driving the vehicle with this code active, as it may lead to a dead battery, electrical system failure, or stalling while driving.

6. How much does it typically cost to repair the Generator L Terminal Open Circuit issue in a Buick?

- The cost of repair can vary depending on the specific cause of the issue. It may range from a simple wiring repair costing a few hundred dollars to a complete alternator replacement costing over a thousand dollars.

7. Can a weak car battery cause the B1910 code to appear in a Buick?

- While a weak battery alone may not trigger the B1910 code, it can exacerbate the issue by putting additional strain on the charging system components, potentially leading to failure.

8. Are there any preventive maintenance tips to avoid encountering the B1910 code in a Buick?

- Regularly inspecting the charging system components, keeping the battery in good condition, and addressing any electrical issues promptly can help prevent the Generator L Terminal Open Circuit code from appearing.

9. How long does it typically take to diagnose the B1910 code in a Buick at a repair shop?

- The diagnostic process can vary depending on the complexity of the issue and the availability of parts. Generally, it may take anywhere from 30 minutes to a few hours to diagnose the problem accurately.

10. If the B1910 code keeps reappearing after repairs, what should I do next?

- If the code persists after repairs, it is recommended to have a professional mechanic perform a thorough inspection to identify any underlying issues that may be causing the recurrent fault.