AutoCodes – Generic – B1399

B1399 Code - Personalised Key Synchronisation System Programming Failure

Quick Answer

When the Body Control Module (BCM) enters a key programming state, it activates the transceiver to read the key in the ignition key cylinder. Common causes include Passive Anti-Theft System (PATS) key not programmed, 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: B1399 indicates Personalised Key Synchronisation System Programming Failure.
Common causes: Common causes include Passive Anti-Theft System (PATS) key not programmed, 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 11,241

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 Feb 19, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1399 Description

When the Body Control Module (BCM) enters a key programming state, it activates the transceiver to read the key in the ignition key cylinder. If a valid Passive Anti-Theft System (PATS) key is used and there are no concerns with PATS, the key is programmed into the BCM memory. The OBDII code sets when there is an unprogrammed PATS key

OBDII Code B1399 - Personalised Key Synchronisation System Programming Failure - AutoCodes.com — B1399 Code - Personalised Key Synchronisation System Programming Failure

What does this mean?

What are the Possible Causes of the DTC B1399?

Passive Anti-Theft System (PATS) key not programmed
Faulty Body Control Module (BCM)

How to Fix the DTC B1399?

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 B1399 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.

Need more information about the B1399 code?

Need more information on how to fix the B1399 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1399 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1399 Ford — Personalised Key Synchronisation System Programming Failure
B1399 Lincoln — Personalised Key Synchronisation System Programming Failure
B1399 Mercury — Personalised Key Synchronisation System Programming Failure

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 B1399 Code

1. What are the common symptoms of OBDII code B1399 - Personalised Key Synchronisation System Programming Failure?

The common symptoms include difficulty starting the vehicle, intermittent starting issues, and the immobilizer system not recognizing the key.

2. What are the possible causes of OBDII code B1399?

Possible causes include a faulty key fob, issues with the immobilizer system, a damaged key transponder, or a malfunction in the vehicle's security system.

3. How can I diagnose the OBDII code B1399?

Diagnosing this code typically involves using a scan tool to retrieve the code, checking the key fob battery, inspecting the key transponder, and verifying the immobilizer system's connections.

4. Can I repair OBDII code B1399 at home?

Depending on the cause, some repairs for this code can be done at home. These may include replacing the key fob battery, reprogramming the key, or resetting the immobilizer system.

5. Is it safe to continue driving with OBDII code B1399 present?

It's not recommended to continue driving with this code unresolved, as it may lead to starting issues or potential immobilization of the vehicle in the future.

6. How much does it typically cost to repair OBDII code B1399 at a dealership or repair shop?

The cost of repairing this code can vary depending on the cause and the labor rates of the service provider. It's best to get a diagnostic assessment to determine the exact cost.

7. Can a DIY enthusiast fix OBDII code B1399 on their own?

Some DIY enthusiasts with knowledge of automotive systems may be able to troubleshoot and repair this code on their own, especially if it involves simple tasks like replacing the key fob battery.

8. Are there any preventative measures to avoid OBDII code B1399 from occurring?

Regularly checking the key fob battery, ensuring proper key maintenance, and addressing any starting issues promptly can help prevent the occurrence of this code.

9. How long does it typically take to resolve OBDII code B1399?

The time to resolve this code can vary depending on the cause and the complexity of the repair. Simple fixes like replacing a key fob battery may only take a few minutes, while more complex issues can take longer.

10. Are there any recalls related to OBDII code B1399?

Recalls related to this specific code may vary depending on the vehicle make and model. It's advisable to check with the manufacturer or a dealership for any related recalls.