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.
Resources for the Repair and Maintenance of your 2003 Lexus ES300
2003 Lexus ES300
2003 Lexus ES300 Problems
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.
Sludge can build up in the engine because Lexus did not recommend frequent enough oil changes. Lexus will sometimes offer a discount on cleaning the engine if necessary. Owners who changed their oil every 3,000 miles did not experience these problems. This sludge build up can lead to excessive oil consumption.
Intermittent failure of a purge control valve in the evaporative emission system can cause the Check Engine Light to illuminate. A failed valve should be replaced to correct this problem.
2003 Lexus ES300 Questions and Answers
my lexus makes a noise from the front eng.area when i start to go from a stop ,sometimes.80,000 miles on it.
I'm being told by the Lexas dealer that the head lights can not be adjusted. They are at present too low. So is this so that I can not adjust these lights?
I have a cracked cover on my key, the computer inside is o.k. where and how much to repair it?
Hi: I am hearing buzzing noise everytime I press accelerator pedal. The noise seems to be coming from the speed-RPM dials and I am guessing it is caused by a speedometer cable. But the display is...