The Check Engine Light may come on because a component of the oxygen sensor stops working. Replacement of the failed sensor should correct this concern.
Resources for the Repair and Maintenance of your 2003 Lexus RX300
2003 Lexus RX300
2003 Lexus RX300 Problems
Debris can get into the idle air control valve. This will restrict the air flow into the engine, causing idle speed and/or stalling when cold. The valve can be cleaned or replaced to correct this concern.
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.
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.
Intermittent failure of the purge control valve in the evaporative emissions (EVAP) system may cause the Check Engine Light light to illuminate.
2003 Lexus RX300 Questions and Answers
We have a 2003 RX300 AWD with 74,500 miles on it. When does a Lexus RX300 need to have the shocks replaced?
I had my check engine light repaired on my Lexus 2003 rx300 twice in two weeks at a cost of $200. each at my friend's repair shop. Should I bring it back to my Lexus dealer instead?
How do you remove the rear tale gate inside panel so you can change the brake light?
My taillights and side marker lights no longer come on I have replaced all lights and fuse to no avail. What could it be
2003 Lexus RX300 Reviews
cost of rear axle toe ring that causes the ABS to activate during normal braking
cost of diagnosis to determine the cause of the dashboard air bag light to blink on and off
cost of accentuator in the front left door that does not allow the remote key to lock that door
I have a Lexus RX300, 2003, 107k miles. I brought my car in for service to adjust my headlights. Thay said it could not be fixed and that thay would have to replace the hole light. Is that possible
Why would my wood steering wheel suddenly become cloudy and discolored? It was fine one day then it became cloudy and gray looking the next day.
Absolutely love this car. I bought it in 2006 with 27k miles on it.
It handles really well in the snow and ice and drives like a car, not a truck.
The interior is quite roomy and comfortable. The rear storage area is large as well.
Knock on wood, the reliability is great. I've had only minor issues. I had a '99 RX300 whose transmission went at 110,000 miles, and I have 109,000 on this one, so I'm keeping my fingers crossed.