AutoCodes – Ford – B1390 Ford

B1390 Ford Code - Ambient Light Control Module

Quick Answer

The Body Control Module (BCM) monitors the Ambient Light Control Module. Common causes include Faulty Ambient Light Control Module, Ambient Light Control Module harness is open or shorted, Ambient Light Control Module 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: B1390 Ford indicates Ambient Light Control Module.
Common causes: Common causes include Faulty Ambient Light Control Module, Ambient Light Control Module harness is open or shorted, Ambient Light Control Module 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 4,105

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 Feb 18, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B1390 Ford Description

The Body Control Module (BCM) monitors the Ambient Light Control Module. The BCM sets the OBDII code when the Ambient Light Control Module is not to factory specifications.

OBDII Code B1390 Ford - Ambient Light Control Module - AutoCodes.com — B1390 Ford Code - Ambient Light Control Module

What does this mean?

What are the Possible Causes of the DTC B1390 Ford?

Faulty Ambient Light Control Module
Ambient Light Control Module harness is open or shorted
Ambient Light Control Module circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B1390 Ford?

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 does this mean?

Code Tech Notes

B1390:83 Ambient Light Control Module: Value of Signal Protection Calculation Incorrect
B1390:87 Ambient Light Control Module: Missing Message

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1390 Ford 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 Help with the Code?

Get the B1390 Ford 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 B1390 Ford Code

1. What are common symptoms of OBDII code B1390 in a Ford related to the Ambient Light Control Module?

- Common symptoms include malfunctioning ambient lighting, erratic behavior of interior lighting, and dashboard warning lights related to lighting systems.

2. What can cause OBDII code B1390 to trigger in a Ford Ambient Light Control Module?

- The code B1390 can be triggered by a faulty ambient light control module, wiring issues, or a malfunction in the ambient light sensor.

3. How can I diagnose the OBDII code B1390 in my Ford experiencing issues with the Ambient Light Control Module?

- Diagnosis involves checking the ambient light sensor, inspecting the wiring for any damage, and testing the ambient light control module for proper functionality.

4. Are there any DIY repair tips for addressing OBDII code B1390 in a Ford Ambient Light Control Module?

- DIY repair tips include checking and cleaning the ambient light sensor, inspecting and repairing damaged wiring, and resetting the ambient light control module.

5. Can a malfunctioning Ambient Light Control Module (OBDII code B1390) affect other vehicle systems in a Ford?

- Yes, a malfunctioning ambient light control module can potentially affect other lighting systems in the vehicle, such as interior lighting and exterior lighting operation.

6. Is it safe to continue driving my Ford with OBDII code B1390 related to the Ambient Light Control Module?

- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to avoid potential issues with the lighting system.

7. How much does it typically cost to repair OBDII code B1390 in a Ford Ambient Light Control Module?

- Repair costs can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

8. Can I reset the OBDII code B1390 related to the Ambient Light Control Module in my Ford without visiting a mechanic?

- Yes, you can try resetting the code by disconnecting the car battery for a few minutes and then reconnecting it to see if the code clears. If the issue persists, further diagnosis may be needed.

9. What are the long-term effects of ignoring OBDII code B1390 in a Ford Ambient Light Control Module?

- Ignoring the code may lead to continued issues with the ambient lighting system, potential electrical problems, and reduced visibility at night, which can affect driving safety.

10. Are there any recalls or technical service bulletins related to OBDII code B1390 in Ford vehicles with Ambient Light Control Module issues?

- It is recommended to check with Ford dealerships or online resources for any recalls or technical service bulletins specific to OBDII code B1390 and the Ambient Light Control Module in your vehicle.