AutoCodes – Chevrolet – B273A 2018 Chevrolet Silverado

B273A 2018 Chevrolet Silverado Code - Hill Descent Control Switch

Quick Answer

The Body Control Module (BCM) monitors the signal circuit from the Hill Descent Control Switch. Common causes include Faulty Multifunction Switch Instrument Panel, Multifunction Switch Instrument Panel harness is open or shorted, Multifunction Switch Instrument Panel 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: B273A 2018 Chevrolet Silverado indicates Hill Descent Control Switch.
Common causes: Common causes include Faulty Multifunction Switch Instrument Panel, Multifunction Switch Instrument Panel harness is open or shorted, Multifunction Switch Instrument Panel 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 247

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 30, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B273A 2018 Chevrolet Silverado Description

The Body Control Module (BCM) monitors the signal circuit from the Hill Descent Control Switch. The hill descent switch is a momentary switch that is normally open. When the hill descent control switch is pressed once, the body control module will request the electronic brake control module via serial data to disable or enable the hill descent control. When activated, the switch grounds the hill descent control system signal circuit. The electronic brake control module then enables or disables the hill descent control system. The electronic brake control module will request the instrument cluster via serial data to turn the hill descent indicator ON or OFF to notify the driver.

OBDII Code B273A 2018 Chevrolet Silverado - Hill Descent Control Switch - AutoCodes.com — B273A 2018 Chevrolet Silverado Code - Hill Descent Control Switch

What does this mean?

What are the Possible Causes of the DTC B273A 2018 Chevrolet Silverado?

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

How to Fix the DTC B273A 2018 Chevrolet Silverado?

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 B273A 2018 Chevrolet Silverado 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 B273A 2018 Chevrolet Silverado code?

Need more information on how to fix the B273A 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 B273A 2018 Chevrolet Silverado Code

1. What does OBDII code B273A mean for a 2018 Chevrolet Silverado with Hill Descent Control Switch?

The code B273A indicates a malfunction in the Hill Descent Control Switch system of a 2018 Chevrolet Silverado.

2. What are the common symptoms of OBDII code B273A in a 2018 Chevrolet Silverado?

Common symptoms of code B273A may include the Hill Descent Control system not functioning properly, warning lights on the dashboard, and potential issues with vehicle stability on steep descents.

3. What are the possible causes of OBDII code B273A in a 2018 Chevrolet Silverado?

Potential causes of code B273A can include a faulty Hill Descent Control Switch, wiring issues, sensor malfunctions, or problems with the control module.

4. How can I diagnose the OBDII code B273A in my 2018 Chevrolet Silverado?

Diagnosing code B273A involves using an OBDII scanner to retrieve the specific fault code, checking the wiring and connectors related to the Hill Descent Control system, and testing the components for proper functionality.

5. Can I still drive my 2018 Chevrolet Silverado with OBDII code B273A?

It is not recommended to drive the vehicle with an unresolved code B273A, as it may affect the performance and safety of the Hill Descent Control system. It is best to address the issue promptly.

6. How can I repair OBDII code B273A in my 2018 Chevrolet Silverado?

Repairing code B273A may involve replacing the faulty Hill Descent Control Switch, repairing damaged wiring or connectors, resetting the control module, or seeking professional assistance for further diagnosis and repair.

7. Will resetting the OBDII code B273A in my 2018 Chevrolet Silverado make it go away permanently?

Resetting the code may clear it temporarily, but if the underlying issue is not addressed, the code is likely to reappear. It is essential to diagnose and repair the root cause to prevent the code from returning.

8. Can a DIY enthusiast fix OBDII code B273A in a 2018 Chevrolet Silverado?

Depending on the skill level and experience of the DIY enthusiast, it may be possible to address code B273A by following repair guides and using the necessary tools. However, complex issues may require professional assistance.

9. Is OBDII code B273A a common problem in 2018 Chevrolet Silverado vehicles?

While code B273A may not be as common as some other OBDII codes, issues with the Hill Descent Control system can occur in 2018 Chevrolet Silverado vehicles, leading to the triggering of this specific fault code.

10. How much does it cost to repair OBDII code B273A in a 2018 Chevrolet Silverado?

The cost of repairing code B273A can vary depending on the specific issue causing the code, the need for replacement parts, labor costs, and whether the repair is done DIY or by a professional mechanic. It is advisable to obtain estimates from repair shops for an accurate cost assessment.