AutoCodes – Buick – B1911 Buick

B1911 Buick Code - Generator L Terminal Malfunction

Quick Answer

The Diagnostic Trouble Code (DTC) B1911 indicates a circuit malfunction is preventing the generator from charging. 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: B1911 Buick indicates Generator L Terminal Malfunction.
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 704

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 B1911 Buick Description

The Diagnostic Trouble Code (DTC) B1911 indicates a circuit malfunction is preventing the generator from charging. DTC B1911 will set when the Instrument Panel Cluster (IPC) determines that the circuit is grounded by the generator with the ignition switch in the RUN position and engine speed is greater than 600 RPM. This test is only performed when the ignition switch is in the RUN position, IPC measures engine speed greater than 600 RPM and vehicle diagnostics is not active. When DTC B1911 is set, IPC will display BATTERY NOT CHARGING message and the battery indicator will illuminate.

OBDII Code B1911 Buick - Generator L Terminal Malfunction - AutoCodes.com — B1911 Buick Code - Generator L Terminal Malfunction

What does this mean?

What are the Possible Causes of the DTC B1911 Buick?

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

How to Fix the DTC B1911 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 B1911 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 B1911 Buick Code

1. What are the common symptoms of OBDII code B1911 (Generator L Terminal Malfunction) in a Buick?

- Common symptoms include issues with the vehicle's charging system, such as a dead battery, dimming lights, or difficulty starting the engine.

2. What can cause the OBDII code B1911 in a Buick?

- The code B1911 typically indicates a malfunction in the Generator L terminal circuit, which may be caused by a faulty alternator, damaged wiring, or poor electrical connections.

3. How can I diagnose the Generator L Terminal Malfunction in my Buick?

- To diagnose this issue, you can use an OBDII scanner to retrieve the specific fault code and then inspect the alternator, wiring, and connections for any visible damage or loose connections.

4. Is it safe to continue driving my Buick with the Generator L Terminal Malfunction code?

- It is not recommended to drive your Buick with the Generator L Terminal Malfunction code, as it may lead to battery drain, electrical system failures, and potential stalling of the vehicle.

5. Can I repair the Generator L Terminal Malfunction in my Buick myself?

- While some DIY enthusiasts may attempt to repair this issue by checking and fixing wiring connections, it is advisable to consult a professional mechanic for proper diagnosis and repair to ensure the problem is resolved correctly.

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

- The cost of repairing the Generator L Terminal Malfunction can vary depending on the underlying cause of the issue, but it may range from $200 to $500, including parts and labor.

7. Will resetting the OBDII code B1911 in my Buick make the issue disappear?

- Resetting the code may temporarily clear the error message, but if the underlying issue is not addressed and repaired, the code is likely to reappear once the vehicle is driven again.

8. Can a faulty battery cause the Generator L Terminal Malfunction code in a Buick?

- While a faulty battery can contribute to charging system issues, the Generator L Terminal Malfunction code is more commonly associated with problems in the alternator or its related components.

9. What are the risks of ignoring the Generator L Terminal Malfunction code in my Buick?

- Ignoring the Generator L Terminal Malfunction code can lead to further electrical system damage, complete battery discharge, and potential safety hazards if the vehicle stalls unexpectedly.

10. How long does it take to repair the Generator L Terminal Malfunction in a Buick?

- The repair time for the Generator L Terminal Malfunction can vary depending on the extent of the issue and the availability of parts, but it typically takes a few hours to complete the necessary repairs.