99L400 Posted November 1, 2010 Share Posted November 1, 2010 The 99 LS400 just had the timing belt/pump replaced (at 95K). Both lights came on after a couple of short trips. Sent the car back to the neighbor mechanics to see if it was related to belt replacement. The error codes read: #1354 and #1633. The mechanics reset the codes, drove around to make both lights will come back and both did. I searched the Forum and found a similar post. The difference is my car drives as usual while the other car (also a 99 LS400) couldn't go beyond idle RPM unless the accelaration pedal was pressed hard. It looks the trottle position sensor is in the spot light. Is this a DIY type of project or is this a job for the established garage? Will replacing the sensor take care of the problem or there is something else to it? Please advise if you can. Thanks a lot. Quote Link to comment Share on other sites More sharing options...
billydpowell Posted November 2, 2010 Share Posted November 2, 2010 on one of my 99's the VSC & CEL came on and the car ran fine, no change in operation that I could notice. It was determined that my oil control valve was restricted on my left head. I removed it, cleaned it replaced it and no more lights. That was the first of may, no more lights. see it here http://us.lexusownersclub.com/forums/index.php?showtopic=64399&view=findpost&p=409977 Quote Link to comment Share on other sites More sharing options...
99L400 Posted November 9, 2010 Author Share Posted November 9, 2010 on one of my 99's the VSC & CEL came on and the car ran fine, no change in operation that I could notice. It was determined that my oil control valve was restricted on my left head. I removed it, cleaned it replaced it and no more lights. That was the first of may, no more lights. see it here http://us.lexusownersclub.com/forums/index.php?showtopic=64399&view=findpost&p=409977 Cleaned the Oil Control Valve and have been running for more than 100 miles since. It's so far so good and fingers crossed. Thanks for sharing the experience. Quote Link to comment Share on other sites More sharing options...
VBdenny Posted November 12, 2010 Share Posted November 12, 2010 Very interesting. My neighbor has an RX300 which always has both lights on. I will have to check that and see if that is the issue since none of the mechanics they took it to can figure it out. Great information, thanks. Quote Link to comment Share on other sites More sharing options...
VBdenny Posted November 12, 2010 Share Posted November 12, 2010 Billy, I watched your slideshow (the car one) and that was great! I will have to do something like that with my old car pictures. I'm guessing that some of these were family cars. Quote Link to comment Share on other sites More sharing options...
billydpowell Posted November 12, 2010 Share Posted November 12, 2010 Billy, I watched your slideshow (the car one) and that was great! I will have to do something like that with my old car pictures. I'm guessing that some of these were family cars. NOPE..... I owned and drove all of them in my 76 years... also had a 35 Ford coupe and 40 DeSoto.. no photos but before that.... Hi-Oh silver away... Quote Link to comment Share on other sites More sharing options...
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