B3445 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 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 Description
What are the Possible Causes of the DTC B3445?
- 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?
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 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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Information for Specific Makes
- B3445 Buick — Stop Lamp Circuit
- B3445 Cadillac — Stop Lamp Circuit
- B3445 Chevrolet — Stop Lamp Circuit
- B3445 GMC — Stop Lamp Circuit
Frequently Asked Questions about B3445 Code
1. What are the common symptoms of OBDII code B3445 (Stop Lamp Circuit)?
The common symptoms of OBDII code B3445 include the stop lamps staying on continuously, the stop lamps not functioning at all, or the stop lamps flickering intermittently.
2. What are the possible causes of OBDII code B3445 (Stop Lamp Circuit)?
Possible causes of OBDII code B3445 include a faulty stop lamp switch, a wiring issue in the stop lamp circuit, a defective brake pedal position sensor, or a malfunctioning body control module.
3. How can I diagnose OBDII code B3445 (Stop Lamp Circuit)?
To diagnose OBDII code B3445, you can start by checking the stop lamp bulbs, inspecting the wiring harness for any visible damage, testing the stop lamp switch for continuity, and scanning the vehicle's computer for fault codes.
4. Can I still drive my vehicle with OBDII code B3445 (Stop Lamp Circuit) present?
It is not recommended to drive your vehicle with OBDII code B3445 present, as it can affect the proper functioning of your stop lamps, compromising your safety on the road.
5. How can I repair OBDII code B3445 (Stop Lamp Circuit)?
To repair OBDII code B3445, you may need to replace the faulty stop lamp switch, repair any damaged wiring in the stop lamp circuit, recalibrate the brake pedal position sensor, or reprogram the body control module.
6. Will OBDII code B3445 (Stop Lamp Circuit) cause my vehicle to fail an emissions test?
OBDII code B3445 is related to the stop lamp circuit and is not directly linked to emissions. However, it is still important to address the issue to ensure the proper functioning of your vehicle's stop lamps.
7. Can a DIY enthusiast fix OBDII code B3445 (Stop Lamp Circuit)?
Depending on your experience and tools available, a DIY enthusiast may be able to fix OBDII code B3445 by following a repair manual or online guides. However, if you are unsure, it is best to consult a professional mechanic.
8. Is OBDII code B3445 (Stop Lamp Circuit) a common issue in certain vehicle makes and models?
OBDII code B3445 can occur in various vehicle makes and models, especially if there is a problem with the stop lamp circuit components such as the stop lamp switch, wiring, sensors, or control modules.
9. How much does it typically cost to repair OBDII code B3445 (Stop Lamp Circuit) at a repair shop?
The cost to repair OBDII code B3445 can vary depending on the specific cause of the issue, the labor rates of the repair shop, and the cost of replacement parts. It is advisable to get a few quotes from different shops for comparison.
10. Can OBDII code B3445 (Stop Lamp Circuit) cause other electrical problems in my vehicle?
While OBDII code B3445 is specific to the stop lamp circuit, electrical issues in one part of the vehicle can sometimes affect other systems. It is important to address the code promptly to prevent any potential cascading electrical problems.
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