AutoCodes – Buick – B3794 Buick

B3794 Buick Code - Cruise Control Function Request Circuit

Quick Answer

The Cruise Control Switch is an input to the Body Control Module (BCM). Common causes include Faulty Cruise Control Switch, Cruise Control Switch harness is open or shorted, Cruise Control Switch circuit poor electrical connection. 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, Cruise Control Switch harness is open or shorted, Cruise Control Switch circuit poor electrical connection.
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 Popularity 316

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 25, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3794 Buick Description

The Cruise Control Switch is an input to the Body Control Module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The Engine Control Module (ECM) receives the requested cruise control switch function from the BCM via a serial data message. The Diagnostic Trouble Code (DTC) will be set when the BCM detects an invalid voltage signal on the cruise control switch signal circuit for 1 second.

OBDII Code B3794 Buick - Cruise Control Function Request Circuit - AutoCodes.com — B3794 Buick Code - Cruise Control Function Request Circuit

What does this mean?

What are the Possible Causes of the DTC B3794 Buick?

Faulty Cruise Control Switch
Cruise Control Switch harness is open or shorted
Cruise Control Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B3794 Buick?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B3794 Buick code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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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 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.