AutoCodes – Generic – B273A:02

B273A:02 Code - Hill Descent Control Switch Short to Ground

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:02 indicates Hill Descent Control Switch Short to Ground.
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 559

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:02 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. The Diagnostic Trouble Code (DTC) will be set when the BCM detects a short to ground on the signal circuit.

OBDII Code B273A:02 - Hill Descent Control Switch Short to Ground - AutoCodes.com — B273A:02 Code - Hill Descent Control Switch Short to Ground

What does this mean?

What are the Possible Causes of the DTC B273A:02?

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:02?

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:02 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 B273A:02 Code

1. What does the OBDII code B273A:02 mean?

It indicates a "Hill Descent Control Switch Short to Ground," meaning the circuit for the hill descent control switch has an electrical short to ground.

2. What are the common symptoms of code B273A:02?

Symptoms may include the hill descent control system not functioning, an illuminated warning light, or erratic behavior of the hill descent control switch.

3. What causes code B273A:02 to appear?

Common causes include damaged wiring, a faulty hill descent control switch, or corrosion in the electrical connectors.

4. Can I still drive my vehicle with code B273A:02?

Yes, but the hill descent control system may not work, which could affect safety when driving on steep declines.

5. How do I diagnose code B273A:02?

Start by inspecting the wiring and connectors for damage or corrosion. Then test the hill descent control switch and its circuit for proper operation.

6. What tools are needed to repair code B273A:02?

You may need a multimeter for electrical testing, a diagnostic scanner to clear the code, and basic tools to repair or replace wiring and components.

7. How do I fix code B273A:02?

Repair or replace damaged wiring, clean corroded connectors, or replace the hill descent control switch if itâ€™s faulty.

8. Will clearing the code fix the problem permanently?

No, clearing the code will remove it temporarily, but the underlying issue must be repaired to prevent the code from returning.

9. What is hill descent control, and why is it important?

Hill descent control helps maintain a controlled speed when driving downhill, improving safety. A fault in the system can compromise this feature.

10. How much does it cost to repair code B273A:02?

Costs can vary depending on whether itâ€™s a simple wiring repair or if the hill descent control switch needs to be replaced. Expect to pay between $50 and $200 for most repairs.