B1405 2018 GMC Sierra Code - Control Module Voltage Reference Output 2 Circuit
Quick Answer
The B1405 diagnostic trouble code (DTC) for a 2018 GMC Sierra refers to an issue with the Control Module Voltage Reference Output 2 Circuit. Common causes include Faulty Control Module: A malfunctioning control module can disrupt the voltage reference output, triggering the B1405 code, Wiring Issues: Damaged or corroded wiring connections can interfere with the voltage reference signal, Sensor Malfunction: A faulty sensor connected to the control module can cause disruptions in the voltage reference output. 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
- B1405 2018 GMC Sierra indicates Control Module Voltage Reference Output 2 Circuit.
- Common causes
- Common causes include Faulty Control Module: A malfunctioning control module can disrupt the voltage reference output, triggering the B1405 code, Wiring Issues: Damaged or corroded wiring connections can interfere with the voltage reference signal, Sensor Malfunction: A faulty sensor connected to the control module can cause disruptions in the voltage reference output.
- 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 B1405 2018 GMC Sierra Description
The B1405 diagnostic trouble code (DTC) for a 2018 GMC Sierra refers to an issue with the Control Module Voltage Reference Output 2 Circuit. This code indicates that there is a problem with the voltage reference output from a specific control module in the vehicle. The control module in question is responsible for providing a stable voltage reference to various sensors and components within the vehicle's systems. When this circuit malfunctions, it can lead to erratic behavior in these systems, potentially affecting the vehicle's performance and overall functionality.
Common Causes of B1405 2018 GMC Sierra
- Faulty Control Module: A malfunctioning control module can disrupt the voltage reference output, triggering the B1405 code.
- Wiring Issues: Damaged or corroded wiring connections can interfere with the voltage reference signal.
- Sensor Malfunction: A faulty sensor connected to the control module can cause disruptions in the voltage reference output.
- Electrical System Overload: Excessive electrical load on the control module can lead to voltage reference issues.
Symptoms of B1405 2018 GMC Sierra
- Check Engine Light: The most common symptom associated with the B1405 code is the illumination of the check engine light on the vehicle's dashboard.
- Erratic Instrument Cluster Behavior: The instrument cluster may display incorrect readings or behave erratically due to the voltage reference output issue.
- Electrical System Malfunctions: Various electrical components, such as power windows, door locks, or lights, may not function properly.
- Engine Performance Issues: The vehicle may experience poor acceleration, rough idling, or stalling due to the voltage reference problem.
How to Fix B1405 2018 GMC Sierra
- Diagnose the Issue: Use a diagnostic scanner to retrieve the specific DTC and pinpoint the source of the voltage reference problem.
- Inspect Wiring and Connections: Check the wiring harness and connections for any signs of damage, corrosion, or loose connections.
- Test Control Module: Verify the functionality of the control module by testing its voltage output and ensuring it meets specifications.
- Replace Faulty Components: Replace any faulty sensors, wiring, or the control module itself if necessary to resolve the issue.
- Clear Codes and Test: Clear the DTC from the vehicle's computer after repairs are completed and test the vehicle to ensure the issue is resolved.
Cost to Fix B1405 2018 GMC Sierra
The typical repair costs for addressing the B1405 code on a 2018 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 for this repair can range from $100 to $500, with labor costs adding an additional $100 to $300. Overall, the total repair cost for resolving the Control Module Voltage Reference Output 2 Circuit issue may fall within the range of $200 to $800. It's important to note that these estimates are approximate, and actual costs may vary based on factors such as location, vehicle make and model, and the specific repair shop's rates. It's recommended to consult with a qualified mechanic or auto repair shop for a more accurate cost estimate tailored to your situation.
Tech Notes for B1405 2018 GMC Sierra
B1405:03 Control Module Voltage Reference Output 2 Circuit Low Voltage
B1405:07 Control Module Voltage Reference Output 2 Circuit High Voltage
If the B1405 code is stored in the Seat Memory Control Module, check the Seat Motor and Seat Memory Control Module.
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Frequently Asked Questions about B1405 2018 GMC Sierra Code
1. What does the OBDII code B1405 mean on a 2018 GMC Sierra?
The B1405 code indicates an issue with the Control Module Voltage Reference Output 2 Circuit, which may involve a malfunction in the reference voltage signal provided by the control module.
2. What are the common symptoms of the B1405 code on a GMC Sierra?
Symptoms can include the check engine light turning on, intermittent electrical issues, or malfunctioning sensors relying on the voltage reference circuit.
3. What causes the B1405 code to appear on a 2018 GMC Sierra?
Common causes include damaged wiring or connectors, a short or open circuit, a faulty sensor, or a malfunctioning control module.
4. Can I still drive my GMC Sierra with the B1405 code active?
While the truck may still be drivable, unresolved voltage reference circuit issues can lead to further electrical malfunctions or sensor failures, so timely repair is recommended.
5. How do I diagnose the B1405 code on my 2018 GMC Sierra?
Start by inspecting the wiring and connectors in the voltage reference circuit for damage or corrosion, then test the control module and related sensors with a multimeter.
6. What tools are needed to fix the B1405 code?
Basic tools include a diagnostic scan tool, a multimeter for electrical testing, and possibly wiring repair tools if damaged connections are found.
7. What is the cost of repairing the B1405 code on a GMC Sierra?
Repair costs can vary but may range from $50 to $150 for simple wiring fixes, while replacing a faulty control module or sensor can cost several hundred dollars.
8. Can a faulty sensor trigger the B1405 code?
Yes, a faulty sensor that relies on the voltage reference circuit can cause this code if it disrupts the reference voltage signal.
9. How can I prevent the B1405 code from recurring?
Regularly inspect and maintain your vehicle's wiring, connectors, and sensors to prevent damage or corrosion that can lead to circuit issues.
10. Is the B1405 code specific to GMC Sierra trucks?
No, the B1405 code can appear on other GM vehicles with similar voltage reference circuit systems, but the exact diagnosis and repair steps may vary by model.
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