AutoCodes – Generic – B1A3E

B1A3E Code - Siren/ITM Mismatch

Quick Answer

The OBDII codes set when the Intrusion Transceiver Module (ITM) loses battery voltage. Common causes include Faulty Intrusion Transceiver Module (ITM), Intrusion Transceiver Module (ITM) harness is open or shorted, Intrusion Transceiver Module (ITM) 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: B1A3E indicates Siren/ITM Mismatch.
Common causes: Common causes include Faulty Intrusion Transceiver Module (ITM), Intrusion Transceiver Module (ITM) harness is open or shorted, Intrusion Transceiver Module (ITM) 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 3,676

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 14, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1A3E Description

The OBDII codes set when the Intrusion Transceiver Module (ITM) loses battery voltage.

OBDII Code B1A3E - Siren/ITM Mismatch - AutoCodes.com — B1A3E Code - Siren/ITM Mismatch

What does this mean?

What are the Possible Causes of the DTC B1A3E?

Faulty Intrusion Transceiver Module (ITM)
Intrusion Transceiver Module (ITM) harness is open or shorted
Intrusion Transceiver Module (ITM) circuit poor electrical connection

How to Fix the DTC B1A3E?

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 B1A3E 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 B1A3E code?

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Need Help with the Code?

Get the B1A3E code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1A3E Chrysler — Siren/ITM Mismatch
B1A3E Dodge — Siren/ITM Mismatch
B1A3E Jeep — Siren/ITM Mismatch
B1A3E RAM — Siren/ITM Mismatch

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 B1A3E Code

1. What are the common symptoms of OBDII code B1A3E (Siren/ITM Mismatch)?

- The common symptoms include the vehicle's alarm system not working properly, the siren not sounding as expected, and dashboard warning lights related to the security system.

2. What causes the OBDII code B1A3E (Siren/ITM Mismatch) to trigger?

- The code is typically triggered when there is a mismatch between the vehicle's siren and the Integrated Theft Module (ITM), which is a component of the security system.

3. How can I diagnose the cause of OBDII code B1A3E (Siren/ITM Mismatch)?

- Diagnosing this code usually involves checking the connections between the siren and ITM, inspecting for any damaged wiring, and using a diagnostic scanner to retrieve more specific error codes.

4. Can a DIY enthusiast repair OBDII code B1A3E (Siren/ITM Mismatch) at home?

- While some basic troubleshooting like checking connections and wiring can be done at home, resolving this code may require specialized tools and expertise, so it is recommended to consult a professional mechanic.

5. Are there any quick repair tips for addressing OBDII code B1A3E (Siren/ITM Mismatch)?

- Quick tips may include resetting the vehicle's security system, ensuring all connections are secure, and checking the fuse related to the security system.

6. What are the potential risks of ignoring OBDII code B1A3E (Siren/ITM Mismatch)?

- Ignoring this code can lead to the security system malfunctioning, leaving the vehicle vulnerable to theft or causing inconvenience due to the alarm system not functioning correctly.

7. Is it safe to continue driving with OBDII code B1A3E (Siren/ITM Mismatch) unresolved?

- It is generally safe to drive the vehicle with this code as it does not affect the drivability or performance of the car. However, it is recommended to address the issue promptly to ensure the security system functions properly.

8. How much does it cost to repair OBDII code B1A3E (Siren/ITM Mismatch) at a repair shop?

- Repair costs can vary depending on the root cause of the issue, labor rates in your area, and the need for replacement parts. It is advisable to get a diagnostic assessment from a mechanic for an accurate estimate.

9. Can a low battery trigger OBDII code B1A3E (Siren/ITM Mismatch)?

- Yes, a low battery voltage can sometimes cause communication errors between the siren and ITM, leading to the triggering of this code. Ensuring the battery is in good condition is recommended.

10. How long does it typically take to repair OBDII code B1A3E (Siren/ITM Mismatch)?

- The repair time can vary based on the complexity of the issue. Simple fixes like reconnecting loose wiring may take a short time, while more involved repairs could take several hours or longer.