B3445 Buick Code - Stop Lamp Circuit
Quick Answer
Battery voltage for the Center High Mounted Stop Lamp (CHMSL) is applied from the CHMSL/Back-up Fuse in the rear electrical center to the Body Control Module (BCM). Common causes include Faulty Center High Mounted Stop Lamp, Center High Mounted Stop Lamp harness is open or shorted, Center High Mounted Stop Lamp 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
- B3445 Buick indicates Stop Lamp Circuit.
- Common causes
- Common causes include Faulty Center High Mounted Stop Lamp, Center High Mounted Stop Lamp harness is open or shorted, Center High Mounted Stop Lamp 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 B3445 Buick Description
What are the Possible Causes of the DTC B3445 Buick?
- Faulty Center High Mounted Stop Lamp
- Center High Mounted Stop Lamp harness is open or shorted
- Center High Mounted Stop Lamp circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B3445 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 B3445 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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Frequently Asked Questions about B3445 Buick Code
1. What does the OBDII code B3445 mean on a Buick?
The B3445 code indicates an issue with the Stop Lamp Circuit, typically signaling a fault in the brake light system.
2. What are the common symptoms of the B3445 code?
Common symptoms include brake lights not working, a warning light on the dashboard, or the cruise control failing to engage.
3. What causes the B3445 code to appear on a Buick?
The code can be caused by a faulty brake light switch, damaged wiring, burnt-out brake light bulbs, or a malfunction in the body control module (BCM).
4. Can a faulty brake light switch trigger the B3445 code?
Yes, a faulty brake light switch is one of the most common causes of the B3445 code.
5. How do I diagnose the B3445 code on my Buick?
Start by inspecting the brake light bulbs, wiring, and connectors. Use a scan tool to confirm the code and test the brake light switch for proper operation.
6. Can I drive my Buick with the B3445 code active?
Driving with the B3445 code is not recommended, as faulty brake lights can be a safety hazard and may lead to accidents or legal issues.
7. How do I fix the B3445 code on my Buick?
Repairs may include replacing the brake light bulbs, fixing damaged wiring, replacing the brake light switch, or reprogramming the BCM if necessary.
8. Will clearing the B3445 code solve the problem?
Clearing the code without addressing the underlying issue will not fix the problem, and the code is likely to return.
9. How much does it cost to repair the B3445 code on a Buick?
Repair costs depend on the issue, ranging from $10 for a bulb replacement to $200 or more for a new brake light switch or BCM reprogramming.
10. Can a B3445 code affect other vehicle systems?
Yes, the code can impact systems like cruise control or traction control, as these often rely on input from the brake light circuit.
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