AutoCodes – GMC – B384C GMC

B384C GMC Code - Keyless Entry Output Signal Circuit

Quick Answer

The keyless entry control module will detect the keyless entry transmitter when the liftgate unlatch handle is pulled and the transmitter is within 1 meter (3 feet) of the liftgate, the keyless entry control module will send the release enable signal to liftgate control module. Common causes include Faulty Liftgate Handle Switch, Liftgate Handle Switch harness is open or shorted, Liftgate Handle 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: B384C GMC indicates Keyless Entry Output Signal Circuit.
Common causes: Common causes include Faulty Liftgate Handle Switch, Liftgate Handle Switch harness is open or shorted, Liftgate Handle 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 529

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Mar 23, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B384C GMC Description

The keyless entry control module will detect the keyless entry transmitter when the liftgate unlatch handle is pulled and the transmitter is within 1 meter (3 feet) of the liftgate, the keyless entry control module will send the release enable signal to liftgate control module. This Diagnostic Trouble Code (DTC) will set as a history code by the Liftgate Control Module when the Liftgate Handle Switch signal circuit is active for greater than 25 seconds

OBDII Code B384C GMC - Keyless Entry Output Signal Circuit - AutoCodes.com — B384C GMC Code - Keyless Entry Output Signal Circuit

What does this mean?

What are the Possible Causes of the DTC B384C GMC?

Faulty Liftgate Handle Switch
Liftgate Handle Switch harness is open or shorted
Liftgate Handle Switch circuit poor electrical connection
Faulty Liftgate Control Module

How to Fix the DTC B384C GMC?

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 B384C GMC 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 B384C GMC Code

What does the OBDII code B384C indicate for GMC vehicles?

The code B384C indicates a malfunction in the keyless entry output signal circuit, which can affect the vehicle's ability to respond to keyless entry commands.

What are common symptoms associated with the B384C code?

Common symptoms include non-functioning keyless entry system, issues with remote start, or the vehicle not recognizing the key fob.

What could cause the B384C code to be triggered?

Causes may include a faulty keyless entry module, damaged wiring or connectors, a dead key fob battery, or interference from other electronic devices.

How can I diagnose the B384C code?

Start by checking the key fob battery and replacing it if necessary. Then inspect the wiring and connectors for damage. Use a scan tool to check for additional codes that may point to the issue.

What is the first step in repairing the B384C code?

The first step is to verify that the key fob is functioning properly. Test with a known working key fob to determine if the issue lies with the fob or the vehicle's system.

Can I reset the B384C code myself?

Yes, you can reset the code using an OBDII scanner after addressing the underlying issue. However, if the problem persists, further diagnosis may be necessary.

Is it safe to drive with the B384C code?

While it is generally safe to drive, the keyless entry and remote features will be non-functional, which could be inconvenient or a security concern.

How much will it cost to repair the B384C code?

Repair costs can vary widely depending on the underlying issue, but expect to pay anywhere from $50 to $300 for diagnostics and repairs, depending on whether it's a simple fix or requires module replacement.

Can a software update fix the B384C code?

In some cases, a software update for the vehicle's control module may resolve the issue. Check with a dealership or qualified mechanic to see if this is applicable for your vehicle.