AutoCodes – Generic – B2394

B2394 Code - Flash To Pass / Optical Horn Switch Circuit Stuck

Quick Answer

The Cluster monitors the Flash To Pass / Optical Horn Switch Circuit. Common causes include Faulty Multifunction Switch, Multifunction Switch harness is open or shorted, Multifunction Switch 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: B2394 indicates Flash To Pass / Optical Horn Switch Circuit Stuck.
Common causes: Common causes include Faulty Multifunction Switch, Multifunction Switch harness is open or shorted, Multifunction Switch 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 1,985

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 Dec 04, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2394 Description

The Cluster monitors the Flash To Pass / Optical Horn Switch Circuit. The Diagnostic Trouble Code (DTC) is set when the Cluster detects the Flash to Pass Switch Input circuit voltage is less than the expected value.

OBDII Code B2394 - Flash To Pass / Optical Horn Switch Circuit Stuck - AutoCodes.com — B2394 Code - Flash To Pass / Optical Horn Switch Circuit Stuck

What does this mean?

What are the Possible Causes of the DTC B2394?

Faulty Multifunction Switch
Multifunction Switch harness is open or shorted
Multifunction Switch circuit poor electrical connection
Faulty Cluster

How to Fix the DTC B2394?

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 B2394 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 B2394 code?

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Need Help with the Code?

Get the B2394 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2394 Chrysler — Flash To Pass / Optical Horn Switch Circuit Stuck
B2394 Dodge — Flash To Pass / Optical Horn Switch Circuit Stuck
B2394 Jeep — Flash To Pass / Optical Horn Switch Circuit Stuck
B2394 RAM — Flash To Pass / Optical Horn Switch Circuit Stuck

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 B2394 Code

1. What are the common symptoms of OBDII code B2394 (Flash To Pass / Optical Horn Switch Circuit Stuck)?

- Common symptoms include the inability to use the flash-to-pass feature or the horn not working properly.

2. What are the possible causes of OBDII code B2394?

- The code B2394 can be caused by a faulty flash-to-pass switch, a malfunctioning optical horn switch, or issues with the wiring in the circuit.

3. How can I diagnose the cause of OBDII code B2394?

- To diagnose the issue, you can perform a visual inspection of the flash-to-pass and horn switches, test the switches for continuity, and check the wiring for any signs of damage or corrosion.

4. Can I repair OBDII code B2394 on my own?

- If you have experience with automotive electrical systems, you may be able to repair the issue on your own by replacing the faulty switches or repairing the wiring. Otherwise, it's recommended to consult a professional mechanic.

5. Are there any temporary fixes for OBDII code B2394?

- In some cases, temporarily disconnecting the battery to reset the system may clear the code temporarily. However, it's important to address the root cause of the issue to prevent it from reoccurring.

6. Is OBDII code B2394 a serious problem?

- While the code itself may not affect the drivability of the vehicle, it is important to address the issue promptly as it may impact important safety features like the horn.

7. How much does it typically cost to repair OBDII code B2394?

- The cost of repairing OBDII code B2394 can vary depending on the underlying cause of the issue, but it may involve replacing the switches or repairing the wiring, which can range from moderate to expensive.

8. Can OBDII code B2394 cause other problems in the vehicle?

- While the code specifically relates to the flash-to-pass and horn switches, unresolved issues with these components may lead to other safety concerns or affect the overall functionality of the vehicle's electrical system.

9. How often does OBDII code B2394 occur in vehicles?

- The occurrence of OBDII code B2394 can vary depending on the make and model of the vehicle, as well as the age and condition of the electrical components involved.