B1390 2016 GMC Sierra Code - Control Module Supply Circuit 1
Quick Answer
The B1390 diagnostic trouble code (DTC) for a 2016 GMC Sierra refers to an issue with the Control Module Supply Circuit 1. Common causes include Faulty Wiring: Damaged or corroded wiring leading to the control module can disrupt the power supply, Blown Fuse: A blown fuse in the circuit can prevent power from reaching the control module, Malfunctioning Relay: A faulty relay that controls the power supply to the control module can trigger the B1390 code. 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 2016 GMC Sierra indicates Control Module Supply Circuit 1.
- Common causes
- Common causes include Faulty Wiring: Damaged or corroded wiring leading to the control module can disrupt the power supply, Blown Fuse: A blown fuse in the circuit can prevent power from reaching the control module, Malfunctioning Relay: A faulty relay that controls the power supply to the control module can trigger the B1390 code.
- 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 B1390 2016 GMC Sierra Description
The B1390 diagnostic trouble code (DTC) for a 2016 GMC Sierra refers to an issue with the Control Module Supply Circuit 1. This code indicates a problem with the power supply to a specific control module in the vehicle. Control modules are electronic components that manage and regulate various systems within the vehicle, such as the engine, transmission, and safety features. In this case, Control Module Supply Circuit 1 is likely responsible for providing power to a critical control module.
Common Causes of B1390 2016 GMC Sierra
- Faulty Wiring: Damaged or corroded wiring leading to the control module can disrupt the power supply.
- Blown Fuse: A blown fuse in the circuit can prevent power from reaching the control module.
- Malfunctioning Relay: A faulty relay that controls the power supply to the control module can trigger the B1390 code.
- Control Module Failure: The control module itself may be malfunctioning, causing it to not receive power properly.
Symptoms of B1390 2016 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 Performance Issues: The vehicle may experience poor acceleration, rough idling, or stalling due to the control module not receiving proper power.
- Transmission Problems: Shift delays, harsh shifting, or transmission slipping may occur as a result of the control module supply circuit issue.
- Electrical Malfunctions: Issues with various electrical components in the vehicle, such as power windows, door locks, or lights, may be observed.
How to Fix B1390 2016 GMC Sierra
- Diagnose the Issue: Use a diagnostic scanner to retrieve the trouble code and perform further testing to pinpoint the exact cause of the control module supply circuit problem.
- Inspect Wiring and Connections: Check the wiring harness and connections leading to the control module for any damage or corrosion. Repair or replace as needed.
- Test Fuses and Relays: Inspect and test the fuses and relays related to the control module supply circuit. Replace any faulty components.
- Replace Control Module: If the control module is found to be faulty, it may need to be replaced with a new unit.
- Clear Codes and Test: After completing the repairs, clear the trouble codes from the vehicle's computer and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix B1390 2016 GMC Sierra
The typical repair costs for addressing the B1390 code on a 2016 GMC Sierra can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of parts such as wiring harnesses, fuses, relays, or a new control module can range from $100 to $500 or more. Labor costs at an auto repair shop can add an additional $100 to $300 or more, depending on the shop's hourly rates and the complexity of the repair.
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Frequently Asked Questions about B1390 2016 GMC Sierra Code
1. What are the common symptoms of OBDII code B1390 in a 2016 GMC Sierra?
- Common symptoms include issues with starting the vehicle, rough idling, poor fuel economy, and potential stalling.
2. What does the OBDII code B1390 for Control Module Supply Circuit 1 indicate in a 2016 GMC Sierra?
- This code indicates a problem with the supply circuit of a control module in the vehicle.
3. What are some possible causes of the B1390 OBDII code in a 2016 GMC Sierra?
- Possible causes include a faulty control module, damaged wiring or connectors, a blown fuse, or a malfunctioning power relay.
4. How can I diagnose the B1390 code in my 2016 GMC Sierra?
- Diagnosis typically involves checking the wiring and connectors related to the control module, testing the power supply to the module, and inspecting for any visible damage.
5. Can I drive my 2016 GMC Sierra with the B1390 code present?
- It is not recommended to drive the vehicle with this code as it can lead to further damage and potential safety hazards.
6. How can I repair the Control Module Supply Circuit 1 issue in my 2016 GMC Sierra?
- Repair may involve replacing the faulty control module, repairing damaged wiring or connectors, replacing blown fuses, or addressing any power relay issues.
7. Is it safe to reset the OBDII code B1390 in a 2016 GMC Sierra using a diagnostic tool?
- While resetting the code may temporarily clear the warning light, it is important to address the underlying issue causing the code to prevent further problems.
8. Can a DIY enthusiast fix the B1390 code in a 2016 GMC Sierra?
- Depending on the technical skills and tools available, some DIY enthusiasts may be able to diagnose and repair the issue themselves, but professional assistance is recommended for complex electrical problems.
9. How much does it cost to repair the B1390 code in a 2016 GMC Sierra at a mechanic?
- Repair costs can vary based on the exact cause of the issue, but it is advisable to budget for diagnostic fees, parts replacement costs, and labor charges when visiting a mechanic.
10. Will the B1390 code in a 2016 GMC Sierra cause the vehicle to fail an emissions test?
- Yes, unresolved OBDII codes like B1390 can lead to a failed emissions test as they indicate a malfunction in the vehicle's control systems.
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