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Engine-Codes – Buick – B1379 Buick

B1379 Buick Code - Ignition 3 Fault

Quick Answer

The B1379 Buick code indicates an ignition 3 fault, which means there is an issue with the ignition system in the vehicle. Common causes include Faulty ignition coil, Worn-out spark plugs, Malfunctioning ignition module. 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
B1379 Buick indicates Ignition 3 Fault.
Common causes
Common causes include Faulty ignition coil, Worn-out spark plugs, Malfunctioning ignition module.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 14, 2024
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Code B1379 Buick Description

The B1379 Buick code indicates an ignition 3 fault, which means there is an issue with the ignition system in the vehicle. The ignition system is responsible for starting the engine and maintaining its operation. Ignition faults can lead to various problems with engine performance, fuel efficiency, and overall drivability of the vehicle.

OBDII Code B1379 Buick - Ignition 3 Fault
B1379 Buick Code - Ignition 3 Fault

Common Causes of B1379 Buick

  1. Faulty ignition coil
  2. Worn-out spark plugs
  3. Malfunctioning ignition module
  4. Damaged ignition wiring
  5. Poor electrical connection

Symptoms of B1379 Buick

  1. Engine misfires
  2. Rough idling
  3. Poor acceleration
  4. Difficulty starting the engine
  5. Stalling of the engine

How to Fix B1379 Buick

  1. Diagnose the specific component causing the ignition 3 fault using a diagnostic scanner.
  2. Inspect the ignition coil, spark plugs, ignition module, and wiring for any visible damage or wear.
  3. Replace the faulty component, whether it be the ignition coil, spark plugs, ignition module, or wiring.
  4. Clear the diagnostic trouble codes from the vehicle's system.
  5. Test drive the vehicle to ensure the issue has been resolved and that the engine is running smoothly.

Cost to Fix B1379 Buick

The typical repair costs for an ignition 3 fault can vary depending on the specific component that needs to be replaced. On average, the cost can range from $150 to $500, including parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate. Keep in mind that rates may be higher at dealerships or in metropolitan areas, while independent shops may offer more affordable prices.

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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 B1379 Buick Code

1. What does the OBDII code B1379 mean on a Buick?

B1379 indicates an "Ignition 3 Fault," meaning there is an issue with the circuit responsible for the third ignition input in the vehicle's electrical system.

2. What are the common symptoms of code B1379 in a Buick?

Symptoms may include the engine not starting, intermittent loss of power to electrical components, or dashboard warning lights staying on.

3. What causes the B1379 Ignition 3 Fault code to appear?

Common causes include a faulty ignition switch, damaged wiring or connectors in the Ignition 3 circuit, or a malfunctioning Body Control Module (BCM).

4. Can I drive my Buick with the B1379 code?

It’s not recommended to drive with this code active, as it may lead to electrical malfunctions or prevent the engine from restarting.

5. How do I diagnose the B1379 code on my Buick?

Start by checking the Ignition 3 circuit for loose or damaged wiring, inspect the ignition switch for faults, and use a scan tool to test the BCM for proper operation.

6. How do I fix the B1379 Ignition 3 Fault code?

Repairs may involve replacing the ignition switch, repairing damaged wiring or connectors, or reprogramming or replacing the BCM if necessary.

7. Can a dead battery cause the B1379 code?

A weak or dead battery typically won’t cause this code, but power fluctuations during startup or low voltage can exacerbate electrical issues.

8. Will clearing the B1379 code fix the issue?

Clearing the code may reset it temporarily, but if the underlying problem isn’t resolved, the code will reappear.

9. How much does it cost to repair a B1379 code on a Buick?

The repair cost depends on the cause. Replacing an ignition switch might cost $150–$300, while BCM repairs or replacements could exceed $500.

10. Can I fix code B1379 on my Buick myself?

If you have basic electrical knowledge and tools, you can inspect wiring and connectors. However, BCM diagnosis and replacement may require professional expertise.

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