1999 Lexus ES300 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1999 Lexus ES300
1999 Lexus ES300 Problems
The Check Engine Light may illuminate because a component of the oxygen sensor stops working. As a result the engine computer is unable to determine the proper ratio of air to fuel for the engine. Replacing the failed oxygen sensor should correct this concern.
On higher mileage vehicles, an engine misfire may develop and/or the Check Engine Light may illuminate due to a failed ignition coil. It is not uncommon to replace all the coils when the first one fails in order to prevent return trips to the repair shop.
1999 Lexus ES300 Questions
I've changed all the coils,map sensor and air filter hoses light goes off every time but after a few miles comes back on again.
i changed the gaskets and oil is still getting into the spark plug tubes can anyone tell me why