AutoCodes – Chevrolet – B1390 Chevrolet

B1390 Chevrolet Code - Control Module Supply Circuit 1

Quick Answer

The vehicle control modules or sensors monitor the system voltage to verify the system voltage is within the normal operating range. Common causes include Low battery voltage, Faulty Control Module, Control Module harness is open or shorted. 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 Chevrolet indicates Control Module Supply Circuit 1.
Common causes: Common causes include Low battery voltage, Faulty Control Module, Control Module harness is open or shorted.
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 6,757

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 Jul 11, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1390 Chevrolet Description

The vehicle control modules or sensors monitor the system voltage to verify the system voltage is within the normal operating range. Damage to components, and incorrect data can occur when the voltage is out of range. The vehicle has multiple Control Modules that will set this Diagnostic Trouble Code (DTC).

OBDII Code B1390 Chevrolet - Control Module Supply Circuit 1 - AutoCodes.com — B1390 Chevrolet Code - Control Module Supply Circuit 1

What does this mean?

What are the Possible Causes of the DTC B1390 Chevrolet?

Low battery voltage
Faulty Control Module
Control Module harness is open or shorted
Control Module circuit poor electrical connection

How to Fix the DTC B1390 Chevrolet?

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 B1390 Chevrolet 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.

Need more information about the B1390 Chevrolet code?

Need more information on how to fix the B1390 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1390 Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

B1390 2014 Chevrolet Silverado — Control Module Supply Circuit 1
B1390 2015 Chevrolet Silverado — Control Module Supply Circuit 1
B1390 2016 Chevrolet Silverado — Control Module Supply Circuit 1
B1390 2017 Chevrolet Silverado — Control Module Supply Circuit 1
B1390 2018 Chevrolet Silverado — Control Module Supply Circuit 1

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 Chevrolet Code

1. What are the common symptoms of OBDII code B1390 Chevrolet?

The common symptoms of OBDII code B1390 Chevrolet include issues with vehicle starting, rough idling, stalling, and poor acceleration.

2. What does OBDII code B1390 Chevrolet indicate?

OBDII code B1390 Chevrolet indicates a problem with the Control Module Supply Circuit 1, which is responsible for providing power to certain vehicle modules.

3. What are the possible causes of OBDII code B1390 Chevrolet?

Possible causes of OBDII code B1390 Chevrolet include a faulty control module, wiring issues, blown fuses, or a problem with the vehicle's battery or alternator.

4. How can I diagnose the source of OBDII code B1390 Chevrolet?

Diagnosing OBDII code B1390 Chevrolet involves using a diagnostic scanner to read the code, checking the control module and associated wiring for damage, and testing the vehicle's battery and alternator.

5. Can I still drive my vehicle with OBDII code B1390 Chevrolet?

It is not recommended to drive your vehicle with OBDII code B1390 Chevrolet, as it can lead to further damage and potential safety hazards. It's best to address the issue promptly.

6. How can I repair OBDII code B1390 Chevrolet?

Repairing OBDII code B1390 Chevrolet may involve replacing a faulty control module, repairing damaged wiring, checking and replacing blown fuses, or addressing any battery or alternator issues.

7. Is it possible to reset OBDII code B1390 Chevrolet without fixing the underlying issue?

While you can clear the code temporarily with a diagnostic scanner, it is important to address the underlying issue causing OBDII code B1390 Chevrolet to prevent further problems.

8. How much does it cost to repair OBDII code B1390 Chevrolet?

The cost of repairing OBDII code B1390 Chevrolet can vary depending on the specific cause of the issue, the labor rates in your area, and the cost of any replacement parts needed.

9. Can a DIY enthusiast fix OBDII code B1390 Chevrolet at home?

Depending on your skill level and access to tools, some DIY enthusiasts may be able to address OBDII code B1390 Chevrolet at home by following repair guides and utilizing diagnostic equipment.

10. How often does OBDII code B1390 Chevrolet occur in Chevrolet vehicles?

OBDII code B1390 Chevrolet is relatively uncommon but can occur in Chevrolet vehicles due to various electrical issues related to the control module supply circuit.