AutoCodes – Nissan – U1240 Nissan

U1240 Nissan Code - AV Switch Connection

Quick Answer

The A/C and Audio and Video (AV) Switch assembly power supply and ground circuit malfunction is detected. Common causes include Faulty Audio and Video (AV) Control Unit, Audio and Video Control Unit harness is open or shorted, Audio and Video Control Unit 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: U1240 Nissan indicates AV Switch Connection.
Common causes: Common causes include Faulty Audio and Video (AV) Control Unit, Audio and Video Control Unit harness is open or shorted, Audio and Video Control Unit 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 3,940

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 May 05, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1240 Nissan Description

The A/C and Audio and Video (AV) Switch assembly power supply and ground circuit malfunction is detected. A malfunction is detected in the communication circuit between AV control unit and A/C and AV switch assembly. A malfunction is detected in the communication signal between AV control unit and A/C and AV switch assembly.

OBDII Code U1240 Nissan - AV Switch Connection - AutoCodes.com — U1240 Nissan Code - AV Switch Connection

What does this mean?

What are the Possible Causes of the DTC U1240 Nissan?

Faulty Audio and Video (AV) Control Unit
Audio and Video Control Unit harness is open or shorted
Audio and Video Control Unit circuit poor electrical connection

How to Fix the DTC U1240 Nissan?

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 U1240 Nissan 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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Need more information on how to fix the U1240 Nissan code? Get Access to Factory Service Manuals

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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 U1240 Nissan Code

1. What does OBDII code U1240 for Nissan AV Switch Connection mean?

- OBDII code U1240 indicates a communication fault related to the AV switch connection in a Nissan vehicle.

2. What are the common symptoms of OBDII code U1240 in a Nissan?

- Common symptoms include issues with the audio or video systems, malfunctioning display screens, or unresponsive controls.

3. What are possible causes of OBDII code U1240 in a Nissan?

- The code may be triggered by a faulty AV switch, damaged wiring or connectors, a malfunctioning control module, or a communication error within the system.

4. How can I diagnose the OBDII code U1240 in my Nissan?

- Diagnosing the code typically involves inspecting the AV switch, checking the wiring and connectors for any damage, and using a diagnostic scanner to identify the exact source of the communication fault.

5. Can I repair OBDII code U1240 in my Nissan at home?

- Depending on the underlying cause, you may be able to repair the issue at home by fixing wiring connections, replacing the AV switch, or resetting the control module. However, complex electrical repairs may require professional expertise.

6. Is it safe to continue driving my Nissan with OBDII code U1240 present?

- It is generally not recommended to drive your Nissan with unresolved OBDII codes, as they can indicate underlying issues that may affect the vehicle's performance or safety. It's best to address the problem promptly.

7. How much does it typically cost to repair OBDII code U1240 in a Nissan?

- The cost of repairing OBDII code U1240 can vary depending on the cause of the issue, the extent of the repair needed, and whether you choose to DIY or seek professional help. Costs may range from a few dollars for simple fixes to a few hundred dollars for more complex repairs.

8. Can resetting the OBDII code U1240 in my Nissan make it go away permanently?

- Resetting the code may temporarily clear the error from the system, but if the underlying issue is not addressed, the code is likely to reappear. It's important to diagnose and fix the root cause of the problem for a permanent solution.

9. How long does it take to repair OBDII code U1240 in a Nissan?

- The repair time for OBDII code U1240 can vary based on the complexity of the issue, the availability of parts, and your level of experience. Simple fixes may take a short time, while more intricate repairs could require several hours or even days.

10. Are there any recalls or technical service bulletins related to OBDII code U1240 in Nissan vehicles?

- It's recommended to check with Nissan dealerships or online resources for any recalls or technical service bulletins related to OBDII code U1240 in your specific Nissan model. These documents may provide valuable information or assistance in addressing the issue.