The Check Engine Light may illuminate due to an O2 sensor heater fault. Most commonly the affected O2 sensor will need to be replaced to correct this concern.
Problems for specific Lexus GS300 years:
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Repairpal verified 2002 Lexus GS300 problems
Harsh shifting of the automatic transmission between 2nd and 3rd gears may be noted. Our technicians tell us this can often be corrected by updating the software in the powertrain control module (PCM).