Engine-CodesChevrolet – B3794:61 2018 Chevrolet Silverado

B3794:61 2018 Chevrolet Silverado Code - Cruise Control Function Request Circuit

Quick Answer

The B3794 diagnostic trouble code (DTC) indicates an issue with the Cruise Control Function Request Circuit in a 2018 Chevrolet Silverado. Common causes include Faulty cruise control switch or wiring, leading to improper signal transmission, Malfunctioning brake pedal position switch, which may not signal the PCM correctly, Damaged or corroded wiring in the cruise control circuit. 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
B3794:61 2018 Chevrolet Silverado indicates Cruise Control Function Request Circuit.
Common causes
Common causes include Faulty cruise control switch or wiring, leading to improper signal transmission, Malfunctioning brake pedal position switch, which may not signal the PCM correctly, Damaged or corroded wiring in the cruise control circuit.
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.
Table of contents Created and updated by William Orellana on Oct 10, 2024
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Code B3794:61 2018 Chevrolet Silverado Description

The B3794 diagnostic trouble code (DTC) indicates an issue with the Cruise Control Function Request Circuit in a 2018 Chevrolet Silverado. This code is part of the vehicle's onboard diagnostics system, which monitors various components and systems to ensure optimal performance. The cruise control system allows the driver to maintain a steady speed without having to keep their foot on the accelerator. When this code is triggered, it signifies that the cruise control system is not receiving the proper signals to engage or maintain its function.

OBDII Code B3794:61 2018 Chevrolet Silverado - Cruise Control Function Request Circuit
B3794:61 2018 Chevrolet Silverado Code - Cruise Control Function Request Circuit

Common Causes of B3794:61 2018 Chevrolet Silverado

  1. Faulty cruise control switch or wiring, leading to improper signal transmission.
  2. Malfunctioning brake pedal position switch, which may not signal the PCM correctly.
  3. Damaged or corroded wiring in the cruise control circuit.
  4. Issues with the vehicle's powertrain control module (PCM) or software glitches.
  5. Faulty sensors related to vehicle speed or throttle position that affect cruise control functionality.

Symptoms of B3794:61 2018 Chevrolet Silverado

  1. Cruise control not engaging or disengaging unexpectedly.
  2. Inconsistent vehicle speed when cruise control is activated.
  3. Warning lights illuminated on the dashboard, such as the cruise control indicator.
  4. Difficulty in maintaining a set speed, with the vehicle accelerating or decelerating erratically.
  5. Possible issues with other electronic systems, such as the speedometer or other driver assistance features.

How to Fix B3794:61 2018 Chevrolet Silverado

  1. Diagnostic Scan: Begin with a thorough diagnostic scan to confirm the B3794 code and check for any related codes that may provide additional context.
  2. Visual Inspection: Conduct a visual inspection of the cruise control switch, wiring, and connectors for signs of damage, corrosion, or loose connections.
  3. Test Brake Switch: Test the brake pedal position switch to ensure it is functioning correctly and providing the necessary signals to the PCM.
  4. Repair or Replace Components: Based on the findings, repair any damaged wiring or connectors and replace faulty components such as the cruise control switch or brake switch.
  5. Reprogram or Reset PCM: If the PCM is suspected to be at fault, it may require reprogramming or resetting to clear the code and restore proper functionality.

Cost to Fix B3794:61 2018 Chevrolet Silverado

The typical repair costs for addressing the B3794 code can range from $100 to $600, depending on the specific issue identified during diagnosis. This estimate includes parts and labor, with parts typically costing between $20 and $300, depending on whether a switch, wiring harness, or PCM needs replacement. Labor costs can vary significantly based on location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour; however, rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It is advisable to check local rates for a more precise estimate and to obtain a detailed quote after the diagnostic process is completed.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B3794:61 2018 Chevrolet Silverado Code

1. What does OBDII code B3794:61 for a 2018 Chevrolet Silverado mean?

Code B3794:61 indicates a Cruise Control Function Request Circuit issue on a 2018 Chevrolet Silverado.

2. What are the common symptoms of a Cruise Control Function Request Circuit problem?

Common symptoms include the cruise control not engaging or disengaging unexpectedly while driving the vehicle.

3. What are the possible causes of OBDII code B3794:61 on a 2018 Chevrolet Silverado?

Potential causes include faulty cruise control switch, damaged wiring harness, a defective cruise control module, or a problem with the vehicle's ECM.

4. How can I diagnose a Cruise Control Function Request Circuit issue on my 2018 Chevrolet Silverado?

Diagnosis involves checking the cruise control switch, inspecting the wiring for any damage, testing the cruise control module, and scanning the vehicle's ECM for any related fault codes.

5. Can I still drive my Chevrolet Silverado with the B3794:61 code?

It is generally safe to drive the vehicle with this code, but you may experience issues with the cruise control function. It is recommended to address the problem promptly to avoid any inconvenience.

6. How can I repair a Cruise Control Function Request Circuit problem on my Silverado?

Repairing this issue may involve replacing a faulty cruise control switch, repairing or replacing damaged wiring, replacing the cruise control module, or reprogramming the vehicle's ECM.

7. Is it possible to reset the B3794:61 code on a 2018 Chevrolet Silverado?

Resetting the code can be done using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes. However, the code will likely return if the underlying issue is not fixed.

8. Can weather conditions affect the Cruise Control Function Request Circuit on a Chevrolet Silverado?

Extreme weather conditions or water exposure can potentially damage the cruise control components and lead to circuit issues. It's essential to protect these components from environmental factors.

9. How much does it cost to repair a Cruise Control Function Request Circuit problem on a 2018 Chevrolet Silverado?

The cost of repairs can vary depending on the specific issue and the labor rates in your area. It is recommended to consult with a mechanic for an accurate estimate based on a diagnostic evaluation.

10. Are there any recalls or technical service bulletins related to the B3794:61 code on a 2018 Chevrolet Silverado?

It's advisable to check with a Chevrolet dealership or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any recalls or bulletins related to this specific OBDII code.

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