I have a 99 Lexus rx300 that won't turn over

The Check Engine Light is on? Did you read the DTCs.

The second link has the answer, the first link says it is a known issue. It is times like this you need the Dealership or a good auto electrician.

Transmission won't shift to third until temp rise

ClubLexus https://www.clublexus.com > forums > 713188-transm...
Apr 1, 2017 - Transmission won't shift to third until temp rise ... The solution is to drive slow and keep rpms at 2.5k and 3k at max till the engine and transmission warm up.
Sometimes transmission wont shift from 3rd to 4th - ClubLexus
Aug 23, 2021
Won't shift from 3rd to 4th gear - Lexus Forum Discussion
Jan 25, 2011
RX300 not shifting into overdrive. - Lexus Forum Discussion
Jul 11, 2013
FIRST POST! RX300 no 4th gear a full year. Fixes? - ClubLexus
Jan 9, 2013
More results from www.clublexus.com

Owner of Lexus RX300 with 182000 miles. Recently the ...

JustAnswer https://www.justanswer.com > lexus > 3wsxt-lexus-rx3...
Aug 22, 2010 - Recently the transmission won't go into overdrive. Stays in 3rd gear like when you press the o/d button to do so. When car is cold (live in ...
1 answer · Top answer: Hello and thank you for using just answer! The check engine light is on correct?

https://www.google.com/search?q=Lexus+RX300+will+shift+into+overdrive+once%2C+and+after+slowing+down+it+won%27t+go+past+3rd+gear

..

A flashing service engine light means that there is a problem that could damage the engine emissions system.. This could be a bad spark plug or injector or many other reasons. You need to have a scanner put on the system and see what codes are are being set. AND do this asap. Most parts stores will not charge you for doing this.

call your dealer

your vss can be in the rear of the trans, or transfer case or also in the rear diff, is your check engine light on ?

2-4-6 could be a fuel or ignition issue, hopefully not a valve. If you have the engine tested at the dealership they will attach a code reader under dash to analize and this should help pinpoint the problem.

I'm not a lexus guy , but I'm thinking that you have a vacuum leak somewhere.

VSC means Vehicle Stability Control.

It comes on when the sensor send a signal that the vehicle is not stable on the ground.....check the wheel balancing and alignment and the air pressure of your tires too.

Good luck.

Rate this solution.

Check for vacuum leaks. ie, vacuum lines them selves, the rubber tube that runs from the air filter to the throttle body. If it has a plastic intake manifold, possibly the rubber port seal gaskets between it and the engine. Lean codes are set when the PCM isn't monitoring all the air coming into the engine (vac leak) or low fuel pressure.

no. the next time the light sets codes you need to have the coputer scaned.