AutoCodes – GMC – B2723 GMC

B2723 GMC Code - PASS-Key Detection Circuit

Quick Answer

The Body Control Module (BCM) supplies a 5 volt signal and a ground circuit for the PASS-KeyÂ® system. Common causes include Faulty Ignition Key, Faulty Ignition Lock Cylinder, Faulty Body Control Module (BCM). 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: B2723 GMC indicates PASS-Key Detection Circuit.
Common causes: Common causes include Faulty Ignition Key, Faulty Ignition Lock Cylinder, Faulty Body Control Module (BCM).
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 637

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 Jan 26, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2723 GMC Description

The Body Control Module (BCM) supplies a 5 volt signal and a ground circuit for the PASS-KeyÂ® system. This allows the BCM to detect PASS-KeyÂ® resistance values. Inserting the PASS-KeyÂ® (with resistor pellet) in the ignition lock cylinder completes the PASS-KeyÂ® circuit. Contacts in the ignition lock cylinder mate with the pellet contacts. The BCM compares the resistance value of the key pellet to the valid resistance programmed into the BCM. If the proper resistance value is read, the BCM allows the following functions to occur: The theft deterrent relay to energize, The steering column to unlock and The BCM sends a message through the serial data line to the Powertrain Control Module (PCM) to enable fuel delivery. If the resistance value is incorrect, a malfunction is present and a DTC will set.

OBDII Code B2723 GMC - PASS-Key Detection Circuit - AutoCodes.com — B2723 GMC Code - PASS-Key Detection Circuit

What does this mean?

What are the Possible Causes of the DTC B2723 GMC?

Faulty Ignition Key
Faulty Ignition Lock Cylinder
Faulty Body Control Module (BCM)

How to Fix the DTC B2723 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 B2723 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 B2723 GMC Code

1. What does OBDII code B2723 GMC indicate?

The B2723 code in GMC vehicles relates to an issue with the PASS-Key detection circuit.

2. What are the common symptoms of a B2723 GMC code?

Common symptoms include the vehicle not starting, the security light staying on, or the vehicle starting and then immediately shutting off.

3. What are the possible causes of a B2723 GMC code?

Possible causes include a faulty ignition lock cylinder, a malfunctioning PASS-Key module, damaged wiring, or a problem with the ignition switch.

4. How can I diagnose a B2723 GMC code?

Diagnosing this code typically involves checking the ignition lock cylinder, inspecting the PASS-Key module, testing the wiring for continuity, and scanning for other related trouble codes.

5. How can I repair a B2723 GMC code?

Repairing a B2723 code may involve replacing the faulty ignition lock cylinder, repairing or replacing the PASS-Key module, fixing damaged wiring, or addressing any issues with the ignition switch.

6. Can a B2723 GMC code be reset without fixing the underlying issue?

Resetting the code without addressing the root cause is not recommended, as the problem will likely persist and could lead to further issues with the vehicle's security system.

7. Is it safe to drive with a B2723 GMC code present?

It is not advisable to drive with a B2723 code active, as it may result in unexpected stalling or failure to start, posing a safety risk.

8. How much does it cost to fix a B2723 GMC code?

The cost of fixing a B2723 code can vary depending on the specific cause of the issue, but it may involve parts and labor expenses for component replacement or repair.

9. Can a DIY enthusiast repair a B2723 GMC code?

Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to address a B2723 code themselves by following repair guides and procedures.

10. How common is the B2723 GMC code in GMC vehicles?

The B2723 code related to the PASS-Key detection circuit is not extremely common but may occur in GMC vehicles with security system issues.