AutoCodes – Jeep – B2338 Jeep

B2338 Jeep Code - Horn Control Circuit Open

Quick Answer

The Front Control Module (FCM) monitors the Horn Control Circuit. Common causes include Faulty Horn Fuse, Faulty Horn Relay, Horn Relay harness is open or shorted. 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: B2338 Jeep indicates Horn Control Circuit Open.
Common causes: Common causes include Faulty Horn Fuse, Faulty Horn Relay, Horn Relay harness is open or shorted.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 8,199

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 Nov 12, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B2338 Jeep Description

The Front Control Module (FCM) monitors the Horn Control Circuit. When the Front Control Module does not detect voltage on the Horn Relay Control circuit the B2338 Diagnostic Trouble Code (DTC) will set.

OBDII Code B2338 Jeep - Horn Control Circuit Open - AutoCodes.com — B2338 Jeep Code - Horn Control Circuit Open

What does this mean?

What are the Possible Causes of the DTC B2338 Jeep?

Faulty Horn Fuse
Faulty Horn Relay
Horn Relay harness is open or shorted
Horn Relay circuit poor electrical connection
Faulty Front Control Module (FCM)

How to Fix the DTC B2338 Jeep?

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 B2338 Jeep 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 B2338 Jeep code?

Need more information on how to fix the B2338 Jeep code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2338 Jeep code diagnosed by a professional: Find a repair shop in your area

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 B2338 Jeep Code

1. What are the common symptoms of OBDII code B2338 in a Jeep related to the horn control circuit open?

- The common symptoms include a non-functioning horn, the horn going off intermittently, or the horn getting stuck.

2. What are the possible causes of the OBDII code B2338 in a Jeep indicating a horn control circuit open?

- The code B2338 can be caused by a faulty horn switch, damaged wiring in the horn circuit, a blown fuse, or a defective horn relay.

3. How can I diagnose the OBDII code B2338 in a Jeep for a horn control circuit open issue?

- You can start by checking the horn fuse, inspecting the horn relay, testing the horn switch, and examining the wiring for any damage or loose connections.

4. What are some tips for repairing the OBDII code B2338 in a Jeep related to a horn control circuit open problem?

- Repair tips include replacing the faulty horn switch, repairing or replacing damaged wiring, checking and replacing the horn relay, and ensuring all connections are secure.

5. Can a DIY enthusiast fix the OBDII code B2338 in a Jeep indicating a horn control circuit open issue?

- Yes, if you have some experience with automotive electrical systems and the necessary tools, you can attempt to diagnose and repair the horn control circuit open problem.

6. Is it safe to drive a Jeep with the OBDII code B2338 related to a horn control circuit open fault?

- It is generally safe to drive the vehicle, but you should address the issue promptly as a non-functioning horn can compromise your safety on the road.

7. Will resetting the OBDII system clear the B2338 code in a Jeep caused by a horn control circuit open problem?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not fixed, the code is likely to reappear after some time.

8. How much does it typically cost to repair the OBDII code B2338 in a Jeep due to a horn control circuit open malfunction?

- The cost of repair can vary depending on the specific cause of the issue, but it may range from $50 to $200 for parts and labor.

9. Can extreme weather conditions affect the occurrence of the OBDII code B2338 in a Jeep related to a horn control circuit open issue?

- Yes, extreme weather conditions can potentially exacerbate existing issues with the horn control circuit, leading to the triggering of the B2338 fault code.

10. Are there any preventive measures to avoid encountering the OBDII code B2338 in a Jeep due to a horn control circuit open problem?

- Regularly inspecting the horn system, checking for any signs of wear or damage, and addressing any issues promptly can help prevent the occurrence of the B2338 fault code.