AutoCodes – Generic – B1A20

B1A20 Code - Vehicle Theft Security System Pre-Arm Timeout

Quick Answer

The Vehicle Theft Security System (VTSS) is designed to protect against whole vehicle theft and provide passive protection against unauthorized vehicle start up. Common causes include Faulty Vehicle Theft Security System, Faulty Controlled Area Network (CAN) Communication. 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: B1A20 indicates Vehicle Theft Security System Pre-Arm Timeout.
Common causes: Common causes include Faulty Vehicle Theft Security System, Faulty Controlled Area Network (CAN) Communication.
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 816

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 Aug 07, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1A20 Description

The Vehicle Theft Security System (VTSS) is designed to protect against whole vehicle theft and provide passive protection against unauthorized vehicle start up. If an invalid key is used to start the vehicle, the engine will cut out after two (2) seconds of running. In subsequent years there were various modules controlling the VTSS system. Wireless Ignition Node (WIN) controls the VTSS system. The Remote Keyless Entry (RKE) transmitter has been replaced with the Fob Integrated Key (FOBIK). The primary components of the system are the Wireless Ignition Node (WIN), FOB Integrated Key (FOBIK), and the Powertrain Control Module (PCM). The system monitors vehicle doors, ignition and liftgate action for any unauthorized operation (includes hood switch for Export). The OBDII sets if the Vehicle Theft Security System (VTSS) pre-arm sequence is interrupted within sixteen seconds after securing the vehicle.

OBDII Code B1A20 - Vehicle Theft Security System Pre-Arm Timeout - AutoCodes.com — B1A20 Code - Vehicle Theft Security System Pre-Arm Timeout

What does this mean?

What are the Possible Causes of the DTC B1A20?

Faulty Vehicle Theft Security System
Faulty Controlled Area Network (CAN) Communication

How to Fix the DTC B1A20?

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 B1A20 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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Information for Specific Makes

B1A20 Chrysler — Vehicle Theft Security System Pre-Arm Timeout
B1A20 Dodge — Vehicle Theft Security System Pre-Arm Timeout
B1A20 Jeep — Vehicle Theft Security System Pre-Arm Timeout
B1A20 RAM — Vehicle Theft Security System Pre-Arm Timeout

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 B1A20 Code

1. What does OBDII code B1A20 Vehicle Theft Security System Pre-Arm Timeout mean?

This code indicates that the vehicle's theft security system did not complete the pre-arm process within the designated time frame.

2. What are the common symptoms of OBDII code B1A20?

Common symptoms include the theft security system not arming properly, the vehicle not starting, and the security light flashing or staying on.

3. What are the possible causes of OBDII code B1A20?

Possible causes include a faulty security system module, issues with the vehicle's wiring, a weak car battery, or a malfunctioning key fob.

4. How can I diagnose OBDII code B1A20?

Diagnosis typically involves using a diagnostic scan tool to read the code, checking the vehicle's security system components for any visible damage or loose connections, and testing the battery voltage.

5. How can I repair OBDII code B1A20?

Repair options may include reprogramming the security system module, replacing a faulty module or key fob, repairing any damaged wiring, or ensuring the car battery is in good condition.

6. Can OBDII code B1A20 be reset without fixing the underlying issue?

Resetting the code without addressing the underlying problem may temporarily clear the code, but the issue will likely reoccur until the root cause is resolved.

7. Is it safe to continue driving with OBDII code B1A20 present?

It is not recommended to drive the vehicle with this code present, as it may lead to potential security system malfunctions or starting issues.

8. Can a DIY enthusiast fix OBDII code B1A20 at home?

Depending on the cause of the code, some DIY enthusiasts may be able to address the issue at home by following repair guides specific to their vehicle make and model.

9. How much does it cost to repair OBDII code B1A20 at a mechanic or dealership?

The cost of repairs can vary depending on the cause of the code, the labor rates of the mechanic or dealership, and the parts needed for the repair.

10. Are there any preventive measures to avoid OBDII code B1A20 from appearing?

Regularly maintaining the vehicle's security system, ensuring the key fob is functioning correctly, and keeping the car battery in good condition can help prevent this code from appearing.