B1390 2018 Chevrolet Silverado Code - Control Module Supply Circuit 1
Quick Answer
The B1390 diagnostic trouble code (DTC) for a 2018 Chevrolet Silverado relates to the Control Module Supply Circuit 1. Common causes include Faulty Control Module: The control module itself may be defective and unable to receive power properly, Wiring or Connector Damage: Damage to the wiring or connectors in the supply circuit can disrupt the flow of power to the control module, Blown Fuse: A blown fuse in the circuit can prevent the control module from receiving power. 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 Faulty Control Module: The control module itself may be defective and unable to receive power properly, Wiring or Connector Damage: Damage to the wiring or connectors in the supply circuit can disrupt the flow of power to the control module, Blown Fuse: A blown fuse in the circuit can prevent the control module from receiving power.
- 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 2018 Chevrolet Silverado Description
The B1390 diagnostic trouble code (DTC) for a 2018 Chevrolet Silverado relates to the Control Module Supply Circuit 1. This code indicates that there is a malfunction in the circuit responsible for supplying power to a specific control module in the vehicle. In this case, Control Module Supply Circuit 1 refers to the primary power source for a particular control module, which could be crucial for the operation of various systems within the vehicle.
Common Causes of B1390 2018 Chevrolet Silverado
- Faulty Control Module: The control module itself may be defective and unable to receive power properly.
- Wiring or Connector Damage: Damage to the wiring or connectors in the supply circuit can disrupt the flow of power to the control module.
- Blown Fuse: A blown fuse in the circuit can prevent the control module from receiving power.
- Malfunctioning Relay: A faulty relay that controls the power supply to the module could be the cause of the issue.
- Battery or Charging System Problems: Issues with the vehicle's battery or charging system may affect the power supply to the control module.
Symptoms of B1390 2018 Chevrolet Silverado
- Check Engine Light: The illumination of the check engine light on the dashboard is a common symptom associated with the B1390 code.
- Loss of Power: The vehicle may experience a loss of power or performance due to the affected control module not functioning correctly.
- Erratic Behavior: Systems controlled by the malfunctioning module may exhibit erratic behavior, such as sudden changes in operation or responsiveness.
- Electrical Issues: Other electrical components in the vehicle may malfunction or behave unexpectedly, indicating a problem with the control module supply circuit.
How to Fix B1390 2018 Chevrolet Silverado
- Diagnostic Scan: Use a diagnostic scanner to retrieve the specific DTC (B1390) and identify the affected control module.
- Visual Inspection: Inspect the wiring, connectors, fuses, and relays in the control module supply circuit for any signs of damage or corrosion.
- Test Power Supply: Check the voltage levels at the control module to ensure it is receiving the correct power supply.
- Replace Faulty Components: Replace any faulty control modules, wiring, connectors, fuses, relays, or other components identified during the inspection.
- Clear DTC: After completing the repairs, clear the DTC from the vehicle's memory using the diagnostic scanner to reset the check engine light.
Cost to Fix B1390 2018 Chevrolet Silverado
The typical repair costs for addressing the B1390 code on a 2018 Chevrolet Silverado 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 a new control module, wiring, connectors, fuses, or relays, along with labor costs, can range from $200 to $800 or more. Additional costs may apply if other related components need to be replaced or if further diagnostics are required.
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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.
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