Engine-CodesFord – B1390 Ford

B1390 Ford Code - Ambient Light Control Module

Quick Answer

The B1390 Ford code refers to a fault in the Ambient Light Control Module in the vehicle. Common causes include Faulty Ambient Light Control Module, Wiring or connection issues between the module and sensors/switches, Electrical system malfunctions. 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, Wiring or connection issues between the module and sensors/switches, Electrical system malfunctions.
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.
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code B1390 Ford Description

The B1390 Ford code refers to a fault in the Ambient Light Control Module in the vehicle. This module is responsible for controlling the ambient lighting inside the vehicle, including interior lighting, footwell lighting, and other mood lighting features. When this module malfunctions, it can lead to issues with the interior lighting system, affecting the overall comfort and convenience of the vehicle.

OBDII Code B1390 Ford - Ambient Light Control Module
B1390 Ford Code - Ambient Light Control Module

Common Causes of B1390 Ford

  1. Faulty Ambient Light Control Module
  2. Wiring or connection issues between the module and sensors/switches
  3. Electrical system malfunctions
  4. Water damage or corrosion affecting the module
  5. Software glitches or programming errors

Symptoms of B1390 Ford

  1. Inconsistent or non-functional interior lighting
  2. Check engine light illuminated on the dashboard
  3. Interior lights not turning on/off as expected
  4. Dim or overly bright interior lighting
  5. Issues with ambient lighting customization settings

How to Fix B1390 Ford

  1. Begin by conducting a thorough diagnostic scan to confirm the B1390 Ford code and pinpoint the exact cause of the issue.
  2. Inspect the wiring harness and connections related to the Ambient Light Control Module for any signs of damage, corrosion, or loose connections.
  3. Test the module itself for proper functionality and communication with the vehicle's sensors and switches.
  4. If the module is found to be faulty, replace it with a new or refurbished unit and reprogram it to match the vehicle's specifications.
  5. Clear the DTC from the vehicle's memory and test the interior lighting system to ensure proper operation.

Cost to Fix B1390 Ford

The typical repair costs for addressing the B1390 Ford code related to the Ambient Light Control Module can vary depending on the specific vehicle make and model, as well as the labor rates in your area. On average, you can expect to pay anywhere from $200 to $500 for parts and labor. Keep in mind that diagnostic time and labor rates at auto repair shops can fluctuate, so it's advisable to obtain quotes from multiple sources to get a more accurate estimate.

Tech Notes for B1390 Ford

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

B1390:87 Ambient Light Control Module: Missing Message

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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 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.

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