Where could air draft be coming from the roof area?
I can hear air draft coming from the roof area but I checked the sunroof but couldn't find any leaks

After several upgrades in 1998, this new Lexus LS 400 featured only minor changes to interior trim. A new engine and new transmission headlined the previous year's changes. Lexus had gradually added features and performance enhancements to their flagship sedan since its inception, but it would remain the same until a total redesign in 2001.
The new engine was a four cam 4.0 liter V-8, enhanced by a clever technology called Variable Valve Timing + intelligence. VVT+i supplied the V-8 with additional power, while lowering emissions and improving fuel economy. The 290 horsepower engine was again teamed with 5-speed automatic, working together to provide a very smooth transition from 0 to 60 mph in just 6.5 seconds. The LS's fuel efficiency was rated at 19/25 mpg.
The rear wheel drive sedan was now available with a Vehicle Skid Control system, which helped to limit nervous moments when driving on slick roads and through tight turns. While the LS 400 was very quick, quiet, and smooth, its focus on comfortable cruising left some eager drivers disappointed. The interior layout and finish, premium Nakamichi sound system, and plush ride were all atop the list of favorite features.
I can hear air draft coming from the roof area but I checked the sunroof but couldn't find any leaks
I have a LS 400 and have had it for 5 years. I had to replace alternator like a year and a half ago. Now my car is doing same thing. Woke up other day battery light was on so i replaced the battery with a new one. It crunk up but then the battery light was still on. So i drove it to my family house and it continued to cut off on me. On the dashboard it says headlight leveling. Can anyone tell me what could it be?
My check engine light came in for a day... then off. About a week later it came on again for a couple days and went off. I got it check at Autozone and it was code P0430 catalyst system efficiency, Bank 2. What should I do even though it went off? Am I good? Do I need to replace something? Trying to conserve $.
IS LS400 HAS ENGINEINTERFERANCE
Air Conditioning
Automatic climate control front air conditioning · Dual front air conditioning zones
Airbags
Dual front airbags · Front side airbags
Audio System
Premium Brand: Nakamichi Audio · AM/FM radio
Brakes
ABS: 4-wheel
Comfort Features
Shift knob trim: leather · Steering wheel trim: leather
Convenience Features
Dimming rearview mirror: auto-dimming · Memorized settings: driver seat · Multi-function remote: trunk release · Steering wheel: power tilt and telescopic · Steering wheel mounted controls: audio
Lights
Exterior entry lights: security approach lamps · Headlights: Auto on/off
Mirrors
Exterior mirrors: power
Roof
Moonroof: power
Seats
Front seat type: bucket · Heated: front seats · Upholstery: leather
Telematics
Phone: cellular phone
Tires and Rims
Wheel type: aluminum alloy · Wheels: chrome
Windows
Front wipers: intermittent