2003 Lexus GS300 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2003 Lexus GS300
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2003 Lexus GS300 ProblemsCheck Engine Light Due to EVAP System Fault
The Check Engine Light may illuminate due to an EVAP system fault. These faults are commonly EVAP canister or gas cap related. Our technicians recommend diagnosing the stored fault codes before replacing any components.
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.
2003 Lexus GS300 QuestionsEngine cycle after reset (1 answer)
Replaced catalytic converter and smog tech said to perform a driving reset.
Will start but dies again
shop diagnosed as replace exhaust manifold,catalyatic converters,center pipe,oxygen sensorsX3 and gaskets -$3675.00 Showing code P0430 catalyst efficiency below threashold
This happened a week ago and are still on. if the converters are below effeciency ,any way of cheating the lights...