B3794:08 2015 Chevrolet Silverado Code - Cruise Control Function Request Circuit
Quick Answer
The B3794:08 diagnostic trouble code (DTC) is specific to the cruise control function request circuit in the 2015 Chevrolet Silverado. Common causes include Faulty Brake Switch: A malfunctioning brake pedal switch that fails to signal when the brakes are applied can disrupt the cruise control system, Wiring Issues: Damaged or corroded wiring in the cruise control circuit can lead to communication failures, Defective Throttle Actuator: A malfunction in the throttle actuator can prevent the cruise control from regulating engine speed. 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
- B3794:08 2015 Chevrolet Silverado indicates Cruise Control Function Request Circuit.
- Common causes
- Common causes include Faulty Brake Switch: A malfunctioning brake pedal switch that fails to signal when the brakes are applied can disrupt the cruise control system, Wiring Issues: Damaged or corroded wiring in the cruise control circuit can lead to communication failures, Defective Throttle Actuator: A malfunction in the throttle actuator can prevent the cruise control from regulating engine speed.
- 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 B3794:08 2015 Chevrolet Silverado Description
The B3794:08 diagnostic trouble code (DTC) is specific to the cruise control function request circuit in the 2015 Chevrolet Silverado. This code indicates that there is an issue with the communication between the cruise control system and the vehicle's Engine Control Module (ECM) or Body Control Module (BCM). The cruise control system is designed to maintain a set speed without the driver needing to keep their foot on the accelerator. When this code is triggered, it can lead to the cruise control system becoming inoperative, which can affect the overall driving experience, especially during long-distance travel.
Common Causes of B3794:08 2015 Chevrolet Silverado
- Faulty Brake Switch: A malfunctioning brake pedal switch that fails to signal when the brakes are applied can disrupt the cruise control system.
- Wiring Issues: Damaged or corroded wiring in the cruise control circuit can lead to communication failures.
- Defective Throttle Actuator: A malfunction in the throttle actuator can prevent the cruise control from regulating engine speed.
- Faulty Cruise Control Module: The cruise control module itself may be defective, leading to a failure in the system.
- Software Glitches: Occasionally, software issues in the ECM or BCM can cause the cruise control system to malfunction.
Symptoms of B3794:08 2015 Chevrolet Silverado
- Inoperative Cruise Control: The cruise control system fails to engage or maintain speed.
- Warning Lights: The illumination of the cruise control indicator light on the dashboard.
- Erratic Speed Control: The vehicle may accelerate or decelerate unexpectedly when attempting to use cruise control.
- Brake Light Issues: Problems with brake lights not functioning correctly, which can affect the cruise control system's ability to disengage.
- Increased Fuel Consumption: Drivers may notice higher fuel usage due to the inability to maintain a constant speed.
How to Fix B3794:08 2015 Chevrolet Silverado
- Diagnostic Scan: Begin with a thorough diagnostic scan to confirm the B3794 code and check for any related codes that may provide additional context.
- Inspect Wiring and Connectors: Visually inspect the wiring and connectors associated with the cruise control system for signs of damage, corrosion, or loose connections.
- Test Brake Switch: Use a multimeter to test the brake switch for proper operation. Replace if faulty.
- Check Throttle Actuator: Test the throttle actuator for functionality, ensuring it responds correctly to cruise control inputs. Replace if necessary.
- Reprogram or Replace Modules: If the cruise control module is found to be defective, it may need to be reprogrammed or replaced to restore functionality.
Cost to Fix B3794:08 2015 Chevrolet Silverado
The typical repair costs for addressing the B3794 code can range from $150 to $600, depending on the specific cause and the components that need to be repaired or replaced. This estimate includes parts and labor. Diagnostic time can vary, with most auto repair shops charging between $80 and $150 per hour. Rates may be higher in metropolitan areas or at dealerships, while independent shops might offer lower rates. It's advisable to check local rates for a more precise estimate, as well as to obtain multiple quotes to ensure a fair price for the repair.
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Frequently Asked Questions about B3794:08 2015 Chevrolet Silverado Code
1. What does the OBDII code B3794:08 mean on a 2015 Chevrolet Silverado?
The code B3794:08 indicates an issue with the Cruise Control Function Request Circuit, specifically a signal malfunction or circuit issue.
2. What are the common symptoms of the B3794:08 code?
Common symptoms include the cruise control system failing to activate, intermittent operation, or the cruise control not responding to input commands.
3. What causes the B3794:08 code in a 2015 Chevrolet Silverado?
Possible causes include a faulty cruise control switch, damaged wiring or connectors in the circuit, or a malfunction in the body control module (BCM).
4. How is the B3794:08 code diagnosed?
A technician will use a scan tool to verify the code, check for related codes, inspect the cruise control switch, and test the wiring and connectors for continuity or damage.
5. Can I still drive my truck with the B3794:08 code active?
Yes, the truck is still drivable, but the cruise control system will likely not function properly until the issue is resolved.
6. How do I fix the B3794:08 code on my Silverado?
Repairs may include replacing the cruise control switch, repairing or replacing damaged wiring, or reprogramming or replacing the body control module.
7. Is the cruise control switch often the main cause of this code?
Yes, a faulty or worn-out cruise control switch is a common cause of the B3794:08 code.
8. How much does it cost to repair the B3794:08 code?
Repair costs can range from $50 to $300, depending on whether the issue is a simple wiring repair or requires replacing the cruise control switch or BCM.
9. Can a dead battery cause the B3794:08 code?
A dead or weak battery is unlikely to directly cause this code, but electrical issues from low voltage may affect the circuit and trigger the code.
10. Does clearing the code fix the problem?
Clearing the code may temporarily remove it, but unless the underlying issue is resolved, the code will likely return.
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