B3674 Chevrolet Code - Movable Roof Control Valve 1 Circuit
Quick Answer
The folding top uses electronically controlled valves to control the flow of hydraulic fluid. Common causes include Faulty Movable Roof Control Valve, Movable Roof Control Valve harness is open or shorted, Movable Roof Control Valve 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
- B3674 Chevrolet indicates Movable Roof Control Valve 1 Circuit.
- Common causes
- Common causes include Faulty Movable Roof Control Valve, Movable Roof Control Valve harness is open or shorted, Movable Roof Control Valve 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.
Code B3674 Chevrolet Description
What are the Possible Causes of the DTC B3674 Chevrolet?
- Faulty Movable Roof Control Valve
- Movable Roof Control Valve harness is open or shorted
- Movable Roof Control Valve circuit poor electrical connection
- Faulty Folding Top Control (FTC) Module
How to Fix the DTC B3674 Chevrolet?
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.
Code Tech Notes
B3674 02 Movable Roof Control Valve 1 Circuit short to ground
B3674 04 Movable Roof Control Valve 1 Circuit open circuit
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B3674 Chevrolet 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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Frequently Asked Questions about B3674 Chevrolet Code
1. What does the OBDII code B3674 mean in a Chevrolet?
The code B3674 indicates an issue with the Movable Roof Control Valve 1 Circuit, typically found in vehicles with retractable or convertible roofs.
2. What are common symptoms of the B3674 code in a Chevrolet?
Symptoms include the convertible roof failing to open or close, unusual noises during operation, or the roof becoming stuck in one position.
3. What causes the B3674 code in a Chevrolet?
Common causes include wiring issues, a faulty control valve, damaged connectors, or a malfunctioning roof control module.
4. Can I still drive my Chevrolet with the B3674 code active?
Yes, you can drive the vehicle, but the functionality of the movable roof may be compromised or completely inoperative.
5. How is the B3674 code diagnosed in a Chevrolet?
Diagnosis involves checking the wiring and connectors for damage, testing the control valve for proper operation, and scanning the roof control system for faults.
6. What tools are needed to repair the B3674 code in a Chevrolet?
You’ll need an OBDII scanner, a multimeter to test voltage and continuity, and possibly basic hand tools to access the roof control components.
7. How can the B3674 code be fixed in a Chevrolet?
Repairs may involve replacing the Movable Roof Control Valve, repairing damaged wiring or connectors, or reprogramming the roof control module.
8. Is the B3674 code common in Chevrolet vehicles?
The code is not very common and usually occurs in specific Chevrolet models equipped with retractable or convertible roofs.
9. How much does it cost to fix the B3674 code in a Chevrolet?
Repair costs can vary widely depending on whether the issue is a simple wiring repair or requires replacing components like the control valve or roof module, typically ranging from $200 to $1,000.
10. Can I clear the B3674 code without repairing the issue?
You can clear the code with an OBDII scanner, but it is likely to return if the underlying issue is not addressed.
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