B1390 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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.
Code B1390 2018 Chevrolet Silverado Description
What are the Possible Causes of the DTC B1390 2018 Chevrolet Silverado?
- 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 2018 Chevrolet Silverado?
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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado code?
Need more information on how to fix the B1390 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B1390 2018 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about B1390 2018 Chevrolet Silverado Code
1. What does the OBDII code B1390 mean on a 2018 Chevrolet Silverado?
The code B1390 indicates an issue with Control Module Supply Circuit 1, which refers to a problem in the power supply to a specific control module.
2. What are the common symptoms of code B1390 in a 2018 Chevrolet Silverado?
Symptoms may include warning lights on the dashboard, failure of certain electrical components, or intermittent power loss to specific systems.
3. What causes the B1390 code in a 2018 Chevrolet Silverado?
Common causes include a blown fuse, damaged wiring, poor electrical connections, or a faulty control module.
4. Can a dead battery trigger code B1390 in a 2018 Chevrolet Silverado?
Yes, if the battery voltage is insufficient or there are issues with the battery connections, it can lead to this code.
5. How do I diagnose the cause of code B1390 in my 2018 Chevrolet Silverado?
Start by checking the fuses, wiring, and connectors for damage or corrosion. Use a multimeter to confirm proper voltage and continuity in the circuit.
6. Is it safe to drive a 2018 Chevrolet Silverado with code B1390 active?
It depends on the affected system, but driving with an unresolved power supply issue can lead to further electrical problems or system failures.
7. How do I fix code B1390 on a 2018 Chevrolet Silverado?
Repairs may involve replacing a blown fuse, repairing damaged wiring or connectors, or replacing the faulty control module.
8. Can an aftermarket accessory cause code B1390 in a 2018 Chevrolet Silverado?
Yes, improperly installed aftermarket accessories can interfere with the electrical system and trigger this code.
9. Do I need to reprogram a module after fixing code B1390 in a 2018 Chevrolet Silverado?
Reprogramming is not always required, but if the control module was replaced, it may need to be reprogrammed with a GM-compatible scan tool.
10. What tools are needed to troubleshoot code B1390 in a 2018 Chevrolet Silverado?
You’ll need a scan tool, a multimeter for electrical testing, and possibly wiring diagrams to trace the affected circuit.
Discuss the causes and fixes for B1390 2018 Chevrolet Silverado OBDII Code
Code B1390 2018 Chevrolet Silverado 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.
