AutoCodes – Cadillac – B2723 Cadillac

B2723 Cadillac 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 Cadillac 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 461

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 Cadillac 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 Cadillac - PASS-Key Detection Circuit - AutoCodes.com — B2723 Cadillac Code - PASS-Key Detection Circuit

What does this mean?

What are the Possible Causes of the DTC B2723 Cadillac?

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

How to Fix the DTC B2723 Cadillac?

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 Cadillac 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 Cadillac Code

1. What are the common symptoms of OBDII code B2723 in a Cadillac related to the PASS-Key detection circuit?

- Common symptoms include issues with the vehicle's anti-theft system, difficulty starting the car, and sporadic engine stalling.

2. What can cause OBDII code B2723 to trigger in a Cadillac?

- The most common causes of this code are a faulty ignition key, a defective PASS-Key module, wiring issues in the detection circuit, or a malfunctioning ignition switch.

3. How can I diagnose the PASS-Key detection circuit issue triggering code B2723 in my Cadillac?

- Diagnosing this issue typically involves checking the ignition key, inspecting the PASS-Key module, testing the wiring connections, and verifying the functionality of the ignition switch.

4. Can I repair OBDII code B2723 related to the PASS-Key detection circuit in my Cadillac at home?

- While some DIY enthusiasts may attempt to address this issue, it is recommended to consult a professional mechanic or automotive technician due to the complexity of the anti-theft system.

5. Is it safe to continue driving my Cadillac with OBDII code B2723 related to the PASS-Key detection circuit?

- It is not advisable to continue driving the vehicle with this code active, as it may lead to unexpected stalling or potential security issues with the anti-theft system.

6. How much does it typically cost to repair OBDII code B2723 in a Cadillac caused by an issue with the PASS-Key detection circuit?

- The cost of repairs can vary depending on the exact cause of the issue, but it may involve replacing components such as the ignition key, PASS-Key module, or ignition switch, which can range from a few hundred to a few thousand dollars.

7. Can a low battery or alternator problem trigger OBDII code B2723 related to the PASS-Key detection circuit in a Cadillac?

- While a low battery or alternator issue may not directly trigger this specific code, it is essential to ensure that the vehicle's electrical system is in good working condition to prevent any related problems.

8. Are there any preventive measures I can take to avoid encountering OBDII code B2723 in my Cadillac due to PASS-Key detection circuit issues?

- Regularly maintaining the ignition key, keeping the PASS-Key module clean and free of debris, and promptly addressing any warning signs related to the anti-theft system can help prevent this code from appearing.

9. Will resetting the OBDII system clear OBDII code B2723 in a Cadillac related to the PASS-Key detection circuit?

- While clearing the code may temporarily turn off the check engine light, it will not fix the underlying issue causing the code to appear. It is essential to diagnose and address the root cause of the problem.

10. How long does it usually take to repair OBDII code B2723 in a Cadillac caused by a malfunction in the PASS-Key detection circuit?

- The repair time can vary depending on the complexity of the issue and the availability of replacement parts, but it may take a few hours to a day for a skilled mechanic to diagnose and fix the problem.