Question about 2001 Lexus RX 300
Yes its related to knock sensor because car is running rich in fuel, and car runs of on safe mode, so overdrive will be off. have you and a friend replace it. remove intake assembly, then intake manifold, but first remove your anifreeze from radiator, trust me you want to remove antifreeze! their are brackets by the fire wall to hold down the manifold, thats the hard part is taking it off and putting that on since not to much space to work on it. on the block you'll see the two knock sensors, has 2 wires each, knock sensors cost between 150- 200 a piece, still cheaper than dealership putting it on. also buy some liquid gasket because you will need that. after putting it all back together reset the ecu and you should be fine,
Posted on Jul 14, 2009
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Posted on Jan 02, 2017
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Start by checking the least expensive items:
Make sure you are not activating the O/D switch in the shift stick inadvertently.
Look at the display panel, if the "Eng" light is on, you must get the code and repair the affected item. If you have knock sensors and/or oxygen sensors malfunctions that may prevent the transmission from shifting to O/D.
Check the ground cables located in the engine compartment, especially the ones behind the air intake manifold. If they are loose or broken it affects the ECU (car computer) and causes the transmission to work erratically. If they become disconnected it may burn the ECU and shut down the car.
Now going to more profound mechanics, it could be a sticking shift solenoid valve, your RX300 transmission have five of those located were the transmission oil strainer (filter) is. It can also be an ECU malfunction and/or related to the wiring from the ECU to the transmission connectors.
Always start from the least expensive and recheck the obvious. Good luck.
Dec 26, 2010 | 2001 Lexus RX 300
Oct 30, 2015 | 2001 Lexus RX 300
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