2000 Lexus ES 300 6 cyl Front Wheel Drive 100400 miles
At times the transmission will not shift into high gear.
Thus, at 65 mph the tach is at 3500 rpm. Letting off on the gas, feathering the gas pedal, shifting into neutral doesn't help. At this point it isn't a constant problem but it can only get worse. There are time is will fail to shift from a dead stop or, it will shift into second but not high gear. Any ideas?
I just found out this evening that I have the same problem with my wife's car. The symptoms are the same as yours.
If I find out anything I will post it here.
July, 1, 2008 AT 11:40 PM
Vacuum modulator. Remove this a check to see if it properly operates with a handheld vacuum pump.
July, 24, 2008 AT 11:00 PM
I read other posts where the transmission was acting this way because the computer had turned off the overdrive because of ODB error codes. I was getting a couple of error codes, so I worked on getting rid of those first. Error codes are gone and transmission still does not shift into last gear.
I cannot find any info in the manual or online about the Vacuum modulator, can you tell me where it is, or any other name it may be called.
July, 30, 2008 AT 9:30 PM
Hi I have the same exact problem and I need please someone to help me with that am about to go to the lexus dealer cuz theres not way I can find out whats wrong
August, 21, 2008 AT 10:13 AM
I was getting P0171 & P0330 OBD codes. I cleaned the mass air flow sensor (MAF) with some MAF cleaner and the P0171 problem went away and the car started running nice again. The P0330 error code indicated that I had a bad knock sensor (bank 2, front of the engine). I took both knock sensors out and they passed the continuity test specified in the shop manual. I put it all back together and the car still would not shift into overdrive and was still setting the P0330 code. I took it back apart and replaced the indicated sensor as well as the subwiring harness that connects the sensors to the main wiring harness. That fixed the shifting problem and the P0330 error code.
The biggest downside of this was that I had to replace the $70 worth of gaskets again since I was not sure that they were reusable. They looked like they may have been single use crush to fit gaskets.
I also learned not to get parts from Lexus. Lexus has to buy their parts from Toyota, and then put their markup on that. Sometimes doubling the cost of the part. Instead, just go to Toyota and request parts for a camry.