AutoCodes – Chevrolet – B258A Chevrolet

B258A Chevrolet Code - Low Beam Control Circuit

Quick Answer

With the headlamp switch in the ON position, the headlamp switch headlamp ON signal circuit is grounded through the headlamp switch. Common causes include Blown Low Beam Headlamp Fuse, Low Beam Headlamp Fuse harness is open or shorted, Low Beam Headlamp Fuse 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: B258A Chevrolet indicates Low Beam Control Circuit.
Common causes: Common causes include Blown Low Beam Headlamp Fuse, Low Beam Headlamp Fuse harness is open or shorted, Low Beam Headlamp Fuse 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 2,312

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 May 26, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B258A Chevrolet Description

With the headlamp switch in the ON position, the headlamp switch headlamp ON signal circuit is grounded through the headlamp switch. The Body Control Module (BCM) responds by applying ground to the low beam relay control circuit which energizes the low beam relay. With the low beam relay energized, the switch contacts close allowing battery voltage to flow through the low beam fuses to the low beam control circuits illuminating the low beam headlamps. The Diagnostic Trouble Code (DTC) will be set when the BCM detects a problem in the headlamp low beam relay control circuit.

OBDII Code B258A Chevrolet - Low Beam Control Circuit - AutoCodes.com — B258A Chevrolet Code - Low Beam Control Circuit

What does this mean?

What are the Possible Causes of the DTC B258A Chevrolet?

Blown Low Beam Headlamp Fuse
Low Beam Headlamp Fuse harness is open or shorted
Low Beam Headlamp Fuse circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B258A Chevrolet?

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

B258A:01 Low Beam Control Circuit Short to Battery
B258A:02 Low Beam Control Circuit Short to Ground
B258A:04 Low Beam Control Circuit Open

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B258A Chevrolet 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 B258A Chevrolet code?

Need more information on how to fix the B258A Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B258A Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

B258A 2014 Chevrolet Silverado — Low Beam Control Circuit
B258A 2015 Chevrolet Silverado — Low Beam Control Circuit
B258A 2016 Chevrolet Silverado — Low Beam Control Circuit
B258A 2017 Chevrolet Silverado — Low Beam Control Circuit
B258A 2018 Chevrolet Silverado — Low Beam Control Circuit

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 B258A Chevrolet Code

What does the OBDII code B258A mean in a Chevrolet vehicle?

The B258A code indicates a problem with the Low Beam Control Circuit, specifically related to the low beam headlight operation.

What are common symptoms of the B258A code?

Common symptoms include the low beam headlights not functioning, dashboard warning lights, or flickering lights.

What might cause the B258A code to trigger?

Possible causes include a faulty headlight bulb, a malfunctioning headlight relay, wiring issues, or problems with the body control module.

How can I diagnose the B258A code?

To diagnose the code, check the low beam bulbs for damage, inspect the wiring and connectors for corrosion, and test the headlight relay and body control module.

Can I drive my car with the B258A code?

While you can drive with the B258A code, it is not recommended due to potential safety hazards from non-functioning headlights.

What repairs are commonly needed for the B258A code?

Repairs may involve replacing burnt-out bulbs, fixing or replacing damaged wiring, or replacing a faulty relay or body control module.

Is it necessary to reset the vehicle's computer after fixing the B258A code?

Yes, after repairs, it is necessary to clear the code using an OBDII scanner and then test drive the vehicle to ensure the code does not return.

How much does it typically cost to repair the B258A code issue?

Repair costs can vary widely depending on the specific issue, ranging from a few dollars for a bulb replacement to several hundred for a body control module replacement.

Can I fix the B258A code issue myself?

Depending on your skill level, you may be able to replace bulbs and relays yourself, but more complex issues might require professional diagnostic tools and expertise.