B1390 - Ambient Light Control Module

Repair Importance Level: 3/3

Repair Difficulty Level: 3/3 What is this?

B1390 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 do I fix code B1390

Check 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.

Tech Notes

What does this mean?

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

Cost of diagnosing the B1390 code

Labor: 1.0

The cost of diagnosing the B1390 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

B1390 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.

B1390 More Information

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Information for specific makes

B1390 BUICK Device Voltage Reference Input Circuit
B1390 CADILLAC Device Voltage Reference Input Circuit
B1390 CHEVROLET Device Voltage Reference Input Circuit
B1390 FORD Ambient Light Control Module
B1390 GMC Device Voltage Reference Input Circuit
B1390 HYUNDAI Passenger Seat Track Position Sensor Short Or Short To Ground
B1390 KIA Passenger Seat Track Position Sensor Short Or Short To Ground
B1390 LINCOLN Ambient Light Control Module
B1390 MERCURY Ambient Light Control Module

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