B1390 2017 GMC Sierra Code - Control Module Supply Circuit 1
Quick Answer
The B1390 code for a 2017 GMC Sierra indicates a problem with the Control Module Supply Circuit 1. Common causes include Faulty Control Module: The control module itself may be malfunctioning, causing issues with the power supply circuit, Wiring Issues: Damage or corrosion in the wiring connected to the control module can disrupt the power supply, Blown Fuse: A blown fuse in the control module supply circuit can prevent the proper voltage from reaching the module. 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 2017 GMC Sierra indicates Control Module Supply Circuit 1.
- Common causes
- Common causes include Faulty Control Module: The control module itself may be malfunctioning, causing issues with the power supply circuit, Wiring Issues: Damage or corrosion in the wiring connected to the control module can disrupt the power supply, Blown Fuse: A blown fuse in the control module supply circuit can prevent the proper voltage from reaching the module.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code B1390 2017 GMC Sierra Description
The B1390 code for a 2017 GMC Sierra indicates a problem with the Control Module Supply Circuit 1. This code specifically relates to a fault in the power supply circuit that supplies voltage to the control module. The control module is a critical component of the vehicle's electronic system, responsible for managing and controlling various functions such as engine performance, transmission operation, emissions control, and more.
Common Causes of B1390 2017 GMC Sierra
- Faulty Control Module: The control module itself may be malfunctioning, causing issues with the power supply circuit.
- Wiring Issues: Damage or corrosion in the wiring connected to the control module can disrupt the power supply.
- Blown Fuse: A blown fuse in the control module supply circuit can prevent the proper voltage from reaching the module.
- Battery Voltage: Low battery voltage or a weak battery can also affect the power supply to the control module.
Symptoms of B1390 2017 GMC Sierra
- Check Engine Light: The most common symptom associated with the B1390 code is the illumination of the check engine light on the vehicle's dashboard.
- Engine Misfires: The vehicle may experience engine misfires or rough idling due to the control module not receiving adequate power.
- Transmission Issues: Erratic shifting or transmission slippage may occur as a result of the control module supply circuit problem.
- Reduced Fuel Efficiency: The vehicle may exhibit decreased fuel efficiency as a consequence of impaired control module operation.
How to Fix B1390 2017 GMC Sierra
- Diagnostic Scan: Begin by using an OBD-II scanner to retrieve the specific trouble codes, including the B1390 code, to pinpoint the issue.
- Check Wiring: Inspect the wiring harness connected to the control module for any signs of damage, corrosion, or loose connections.
- Test Control Module: Test the control module to determine if it is functioning correctly or if it needs to be replaced.
- Check Fuses: Verify the condition of the fuses related to the control module supply circuit and replace any blown fuses.
- Repair or Replace Components: Depending on the findings, repair or replace the faulty wiring, control module, or any other components contributing to the issue.
Cost to Fix B1390 2017 GMC Sierra
The cost of repairing a B1390 code related to the Control Module Supply Circuit 1 in a 2017 GMC Sierra can vary depending on the specific cause of the issue. On average, the repair costs for this type of problem can range from $200 to $600, including parts and labor. However, it's essential to note that prices may vary based on the location of the auto repair shop, the vehicle's make and model, and the extent of the repairs needed. Diagnostic time and labor rates typically range from $80 to $150 per hour, with dealership rates potentially higher and independent shops possibly charging less. It is advisable to obtain a detailed estimate from a trusted auto repair professional to determine the exact cost for this repair.
Need more information about the B1390 2017 GMC Sierra code?
Need more information on how to fix the B1390 2017 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B1390 2017 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about B1390 2017 GMC Sierra Code
1. What does the OBDII code B1390 mean on a 2017 GMC Sierra?
The code B1390 indicates an issue with the Control Module Supply Circuit 1, which typically relates to a voltage or power supply problem for a specific control module.
2. What are the common symptoms of the B1390 code in a 2017 GMC Sierra?
Common symptoms include warning lights on the dashboard, intermittent electrical issues, or certain systems not functioning, such as the radio, HVAC, or other module-controlled features.
3. What causes the B1390 code on a 2017 GMC Sierra?
Possible causes include a blown fuse, damaged wiring, corroded connectors, a faulty control module, or a weak battery.
4. How can I diagnose the B1390 code on my 2017 GMC Sierra?
Start by checking the fuses and battery voltage, inspect the wiring and connectors for damage or corrosion, and use a scan tool to test the affected control module.
5. Can a weak battery trigger the B1390 code on a 2017 GMC Sierra?
Yes, a weak or failing battery can cause insufficient voltage to the control module, triggering the B1390 code.
6. Is it safe to drive a 2017 GMC Sierra with the B1390 code?
It depends on the severity of the issue. While the vehicle may still operate, important systems could malfunction, so it’s best to address the issue promptly.
7. How do I fix the B1390 code on a 2017 GMC Sierra?
Repairs may include replacing a blown fuse, repairing or replacing damaged wiring, cleaning corroded connectors, or replacing the control module if it's defective.
8. Can a B1390 code clear itself on a 2017 GMC Sierra?
In rare cases, it might clear if the issue was intermittent, but the underlying problem should still be diagnosed and resolved to prevent recurrence.
9. How much does it cost to fix a B1390 code on a 2017 GMC Sierra?
Costs can vary widely depending on the cause. Simple repairs like replacing a fuse or cleaning connections are inexpensive, while control module replacement can be more costly.
10. Do I need a professional to fix the B1390 code on my 2017 GMC Sierra?
If you’re comfortable checking fuses, wiring, and connectors, you might resolve simple issues yourself. However, diagnosing and replacing a control module may require professional expertise.
Discuss the causes and fixes for B1390 2017 GMC Sierra OBDII Code
Code B1390 2017 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.