AutoCodesBuick – B2573 Buick

B2573 Buick Code - Hatch Release Switch Circuit

Quick Answer

The hatch release switch circuit provides a direct battery input to the Body Control Module (BCM) when the switch is pressed. Common causes include Faulty Hatch Release Switch, Hatch Release Switch harness is open or shorted, Hatch Release Switch 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
B2573 Buick indicates Hatch Release Switch Circuit.
Common causes
Common causes include Faulty Hatch Release Switch, Hatch Release Switch harness is open or shorted, Hatch Release Switch 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 492
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Dec 29, 2019
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Code B2573 Buick Description

The hatch release switch circuit provides a direct battery input to the Body Control Module (BCM) when the switch is pressed. This input allows the BCM to detect a hatch release request. If the BCM detects battery voltage on the rear compartment release switch signal circuit, the BCM will energize the hatch release relay. The BCM monitors the hatch release switch circuit and determines how long voltage has been applied.
OBDII Code B2573 Buick - Hatch Release Switch Circuit - AutoCodes.com
B2573 Buick Code - Hatch Release Switch Circuit

What are the Possible Causes of the DTC B2573 Buick?

  • Faulty Hatch Release Switch
  • Hatch Release Switch harness is open or shorted
  • Hatch Release Switch circuit poor electrical connection
  • Faulty Body Control Module (BCM)

How to Fix the DTC B2573 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 B2573 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 B2573 Buick Code

1. What does the OBDII code B2573 mean for a Buick?

B2573 indicates an issue with the hatch release switch circuit, often related to electrical problems preventing the hatch from opening correctly.

2. What are common symptoms of the B2573 code?

Symptoms include the hatch failing to open or respond when the release switch is pressed, or intermittent functionality of the hatch release system.

3. What causes the B2573 code on a Buick?

Common causes include a faulty hatch release switch, damaged wiring, corroded connectors, or issues with the body control module.

4. How can I diagnose the B2573 code?

Start by inspecting the hatch release switch and wiring for damage or corrosion, then use a multimeter to check for proper voltage and continuity in the circuit.

5. Can a faulty hatch release switch trigger the B2573 code?

Yes, a malfunctioning or damaged hatch release switch is one of the most common reasons for this code appearing.

6. Is the B2573 code related to a fuse issue?

It could be. Check the relevant fuse for the hatch release system to ensure it is not blown or damaged.

7. How do I fix the B2573 code on a Buick?

Repairs may involve replacing the hatch release switch, repairing or replacing damaged wiring, cleaning corroded connectors, or reprogramming the body control module.

8. Can the B2573 code affect other vehicle functions?

Typically, this code only impacts the hatch release system, but it may indirectly affect convenience features if tied to the body control module.

9. Is it safe to drive with the B2573 code present?

Yes, it’s safe to drive, but you may experience inconvenience due to the hatch not functioning properly.

10. Do I need professional help to resolve the B2573 code?

If basic inspections don’t resolve the issue, consulting a professional technician with experience in Buick electrical systems is recommended.

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