B3794 Buick Code - Cruise Control Function Request Circuit
Quick Answer
The B3794 diagnostic trouble code (DTC) for Buick vehicles relates to the cruise control function request circuit. Common causes include Faulty cruise control switch: The cruise control switch on the steering wheel may be faulty or damaged, preventing proper communication with the ECM or PCM, Wiring issues: Damaged or corroded wiring in the cruise control function request circuit can disrupt the flow of signals between components, Faulty ECM or PCM: A malfunction in the electronic control module or powertrain control module can prevent the cruise control system from receiving the necessary signals. 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 Buick indicates Cruise Control Function Request Circuit.
- Common causes
- Common causes include Faulty cruise control switch: The cruise control switch on the steering wheel may be faulty or damaged, preventing proper communication with the ECM or PCM, Wiring issues: Damaged or corroded wiring in the cruise control function request circuit can disrupt the flow of signals between components, Faulty ECM or PCM: A malfunction in the electronic control module or powertrain control module can prevent the cruise control system from receiving the necessary signals.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code B3794 Buick Description
The B3794 diagnostic trouble code (DTC) for Buick vehicles relates to the cruise control function request circuit. This code indicates that there is a malfunction in the system that controls the activation and deactivation of the cruise control feature in the vehicle. The cruise control system allows the driver to set a desired speed and maintain it without needing to constantly apply pressure to the accelerator pedal. When this code is triggered, it can lead to the cruise control system not functioning properly or not engaging at all.
Common Causes of B3794 Buick
- Faulty cruise control switch: The cruise control switch on the steering wheel may be faulty or damaged, preventing proper communication with the ECM or PCM.
- Wiring issues: Damaged or corroded wiring in the cruise control function request circuit can disrupt the flow of signals between components.
- Faulty ECM or PCM: A malfunction in the electronic control module or powertrain control module can prevent the cruise control system from receiving the necessary signals.
- Blown fuse: A blown fuse related to the cruise control system can also trigger this code, cutting off power to the circuit.
Symptoms of B3794 Buick
- Inability to engage cruise control: One of the most common symptoms associated with this code is the inability to engage the cruise control system. Pressing the cruise control button may not result in the system activating, even if all other conditions for its operation are met.
- Erratic cruise control behavior: If the cruise control does engage, it may behave erratically, such as sudden acceleration or deceleration without driver input.
- Cruise control light on the dashboard: The cruise control indicator light on the dashboard may illuminate or flash when this code is present, indicating a fault in the system.
- Check Engine Light: The B3794 DTC will trigger the check engine light to illuminate on the dashboard, signaling a problem that needs attention.
How to Fix B3794 Buick
- Diagnostic scan: Begin by using a diagnostic scan tool to retrieve the B3794 DTC and confirm the issue with the cruise control function request circuit.
- Check cruise control switch: Inspect the cruise control switch on the steering wheel for any visible damage or malfunction. Replace if necessary.
- Check wiring: Thoroughly inspect the wiring in the cruise control function request circuit for any signs of damage or corrosion. Repair or replace as needed.
- Test ECM/PCM: Test the electronic control module or powertrain control module to ensure it is functioning correctly. Replace if found to be faulty.
- Fuse replacement: Check and replace any blown fuses related to the cruise control system to restore power to the circuit.
Cost to Fix B3794 Buick
The typical repair costs for addressing the B3794 code related to the cruise control function request circuit can vary depending on the specific cause of the issue. Generally, the cost of parts such as a new cruise control switch, wiring repairs, or an ECM/PCM replacement can range from $100 to $500. Labor costs at auto repair shops typically fall between $80 and $150 per hour, with the total repair bill potentially ranging from $200 to $800 or more. It is advisable to consult with a professional mechanic for a more accurate cost estimate based on the specific circumstances of the vehicle and the required repairs.
Need more information about the B3794 Buick code?
Need more information on how to fix the B3794 Buick code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B3794 Buick code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about B3794 Buick Code
1. What does the OBDII code B3794 mean on a Buick?
The B3794 code indicates a problem with the Cruise Control Function Request Circuit, which may involve malfunctioning components or wiring issues in the cruise control system.
2. What are the common symptoms of the B3794 code on a Buick?
Symptoms may include the cruise control not engaging, intermittent cruise control function, or the cruise control light failing to illuminate.
3. What causes the B3794 code on a Buick?
Common causes include a faulty cruise control switch, damaged wiring or connectors in the circuit, or a malfunctioning body control module (BCM).
4. Can I still drive my Buick with the B3794 code?
Yes, you can drive the vehicle, but the cruise control system may not function properly, which could be inconvenient on long drives.
5. How do I diagnose the B3794 code on my Buick?
Diagnosis involves checking the cruise control switch, inspecting wiring and connectors for damage, and using a scan tool to monitor circuit signals.
6. How can I fix the B3794 code on a Buick?
Repairs may include replacing a faulty cruise control switch, repairing damaged wiring, or reprogramming or replacing the body control module if necessary.
7. Is the B3794 code specific to Buick vehicles?
No, while it commonly appears on GM vehicles like Buick, it may also occur in other makes equipped with similar cruise control systems.
8. Can a blown fuse cause the B3794 code on a Buick?
Yes, a blown fuse in the cruise control circuit can disrupt the system and trigger this code.
9. How much does it cost to repair the B3794 code on a Buick?
Repair costs vary but typically range from $100 to $500, depending on whether the issue is a simple wiring repair or a component replacement.
10. Does the B3794 code require reprogramming the BCM?
Reprogramming the BCM is not always necessary, but it may be required if the module itself is faulty or has corrupted data related to the cruise control system.
Discuss the causes and fixes for B3794 Buick OBDII Code
Code B3794 Buick 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.