2000 Lexus RX300 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2000 Lexus RX300
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2000 Lexus RX300 ProblemsLow Engine RPM or Stalling on Cold Start
The 1998-2003 Lexus RX300 may start and stall, or start and run at very low engine speeds when the engine is cold.
The issue is a failed or dirty idle air control valve. This valve is mounted under the throttle body, and modulates airflow to the engine under certain conditions. When the valve becomes dirty, or when the valve fails, proper airflow to the engine is not achieved. This results in start and stall, and low RPM.
To correct the issues, the idle air control valve will need to be tested, and cleaned or replaced.
To help decrease the frequency of this issue, change the air filter no less than once per year.
The Lexus RX300 has a known issue with the valves that if left unchecked, will cause burned valves and engine performance issues.
The engine ‘breathes’ through valves that are pushed open by the camshaft, and closed by springs. When valves are closed, they seal against a valve seat. In this vehicle, the valve seat is too soft, so after the valve contacts it thousands of times, it becomes crushed. Once it is crushed, the valve can no longer make a proper seal, and the valves erode due to extreme temperature (burnt valve).
Symptoms related to this issue:
- Rough idle
- Backfiring through exhaust or intake
- Illumination of the check engine light
- OBD Trouble Codes P0300, P0301, P0302, P0303, P0304
- Loss of power
- Engine Stalling
To repair the burnt valves, the cylinder head must be removed and rebuilt, which is a costly internal engine repair, however, this issue can be prevented through inspection and adjustment of valve clearances every 40,000 miles.
Drivers of the Lexus RX300 may notice excessive oil consumption between oil changes, even to the extent of the engine oil warning light displayed on the multi-function display.
This issue is known to be caused by infrequent oil changes causing engine sludge, or worn piston rings.
The engine should be cleaned of oil sludge, and if oil consumption remains excessive, the engine may need new piston rings, or other internal components replaced.
To avoid this issue, change the engine oil and filter every 3,000 miles, and ensure the proper grade of oil is used.
2000 Lexus RX300 Questionswhen starting fan belt fan makes screeching noise for about 1 min. how to fix? (1 answer)
How can i fix screeching noise in fan area when starting car-goes away after 1 minute
have only had it for 3 mos, put 3,000 miles on it and had trani serviced and checked and said i should have no problems and all i would need is oil change. mechanic today said oil and water are fine. each time i start vehicle white smoke comes out of exhaust, after running for awhile it subside...