The Check Engine Light may illuminate because the mass air flow sensor sends incorrect information to the engine control computer. This can cause a loss of power on acceleration. A failed mass air flow sensor will require replacement.
Car Problem Reports
Lexus IS300 Check Engine Light and Lack of Power Due to Failed Mass Air Flow Sensor
Lexus IS300 Problem
Engine Affected: 3.0L 6 Cylinder
Average Mileage: 105,500 mi (42,000 mi - 185,000 mi)
Visitor, 2002 Lexus IS300, 3.0L 6 Cylinder, 90,000 mi
Check engine light and lack of power due to failed mass air flow sensor
Visitor, 2001 Lexus IS300, 3.0L 6 Cylinder, 185,000 mi
Periodically cleaning out the MAF sensor with a q-tip and some rubbing alcohol helps greatly with this issue. MAF's can be found online for a reasonable price as well, if needed.
Visitor, 2001 Lexus IS300, 3.0L 6 Cylinder
check engine light on due to MAS
Visitor, 2001 Lexus IS300, 3.0L 6 Cylinder, 105,000 mi
check engine ligth on