AutoCodes – Buick – B153A Buick

B153A Buick Code - Liftgate Latch Switches Malfunction

Quick Answer

The unlatch, ratchet, pawl, and sector switches are part of the liftgate latch assembly and are used by the liftgate control module to determine the state of the latch during the process of cinching or unlatching. Common causes include Faulty Liftgate Latch Assembly, Liftgate Latch Assembly harness is open or shorted, Liftgate Latch Assembly 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: B153A Buick indicates Liftgate Latch Switches Malfunction.
Common causes: Common causes include Faulty Liftgate Latch Assembly, Liftgate Latch Assembly harness is open or shorted, Liftgate Latch Assembly 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 983

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 02, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B153A Buick Description

The unlatch, ratchet, pawl, and sector switches are part of the liftgate latch assembly and are used by the liftgate control module to determine the state of the latch during the process of cinching or unlatching. The ratchet and pawl switches will be inactive when the primary and secondary latches are latched, and the sector switch will be active during the power cinch function. Each of the latch switch signal circuits are supplied signal through a resistor and monitored within the liftgate control module. The latch switches share a common low reference circuit from the liftgate control module and when the switch contacts close the signal circuit goes low and the liftgate control module determines the switch to be active.

OBDII Code B153A Buick - Liftgate Latch Switches Malfunction - AutoCodes.com — B153A Buick Code - Liftgate Latch Switches Malfunction

What does this mean?

What are the Possible Causes of the DTC B153A Buick?

Faulty Liftgate Latch Assembly
Liftgate Latch Assembly harness is open or shorted
Liftgate Latch Assembly circuit poor electrical connection
Faulty Liftgate Control Module

How to Fix the DTC B153A 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 B153A 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 B153A Buick Code

1. What does the OBDII code B153A mean on a Buick?

The B153A code indicates a malfunction with the liftgate latch switches, which may involve a communication or wiring issue within the liftgate system.

2. What are the common symptoms of code B153A on a Buick?

Symptoms may include the liftgate not opening or closing properly, the liftgate warning light illuminating, or difficulty locking or unlocking the liftgate.

3. What causes the B153A code to appear on a Buick?

Common causes include a faulty liftgate latch switch, damaged wiring or connectors, or a malfunctioning liftgate control module.

4. Can I still drive my Buick with the B153A code?

Yes, the code usually does not affect drivability, but it may limit access to or secure closure of the liftgate, which can be inconvenient.

5. How do I diagnose the B153A code on my Buick?

Start by inspecting the liftgate latch switch and its wiring for damage, corrosion, or loose connections. A scan tool can also be used to test the liftgate control module and pinpoint the issue.

6. What repairs can fix the B153A code on a Buick?

Repairs may include replacing the liftgate latch switch, repairing or replacing damaged wiring, or reprogramming or replacing the liftgate control module.

7. Is the B153A code specific to Buick vehicles?

While the code is not exclusive to Buick, its specific meaning and repairs depend on the make and model, as it relates to the liftgate system.

8. Can a weak battery cause the B153A code on a Buick?

Yes, a weak or failing battery can sometimes cause communication issues in the liftgate system, leading to this code.

9. How much does it cost to fix the B153A code on a Buick?

Repair costs can vary, but replacing a liftgate latch switch typically ranges from $150 to $300, depending on labor rates and parts pricing.

10. Can I clear the B153A code without fixing the problem?

Clearing the code without addressing the root cause will likely result in the code returning. Proper diagnosis and repair are necessary to resolve the issue.