Engine-Codes - Generic - B1390

B1390 Code - Ambient Light Control Module

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

|B1390 code possible causes

  • 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 is the B1390 code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|B1390 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 B1390 code

Labor: 1.0

The cost to diagnose the B1390 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are B1390 code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|What is B1390 code meaning?

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.

|Need more information with the B1390 code?

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|B1390 code information for specific makes

|Need help with a B1390 code?

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