Do Not Sell My Personal Information Jump to content

2000 Gs 300 Throttle Problems

Recommended Posts

I am new to the club and need help! I have a 2000 GS 300 with the in-line six engine. A problem has developed where the car will start and drive normally, but when turned off and sits for about an hour, the throttle will not accelerate the car. However, if you press the throttle pedal hard to the floor, the engine will accelerate. When this happens the check engine, VSC and VSC off lights come on. The dealer has replaced the throttle pedal proximity sensor, no change. Then the throttle body was removed and cleaned and all terminal and vacuum tube replaced, no change. Then the throttle body was replaced, no change. Has anyone out there experienced the same thing and found the solution. Thanks

Link to comment
Share on other sites

Did the Lexus dealer charge you for the repairs that did not fix the problem? It sounds like a bad TPS - throttle position sensor - but your problem should be easy for a competent mechanic to diagnose.

Link to comment
Share on other sites

I had the same response once on my GS400. No throttle action except at fully depressed. That's the limp-home mode on these engines. It cured itself after about four re-starts, but had stored a code that the dealer said was the computer condemning itself. They believed it to be an anomaly, and another tech I know thought that it was a voltage surge from the alternator that caused all of the sensors to behave out of range. It never came back, and only the code was cleared.

So I would suspect an ECU problem, or something causing the limp-home mode.

Sorry I can't offer more.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...