craigdetter

A bit of background for anyone that might be interested before getting to my question..... I have a 95 ES300 with 122K miles. I recently had a check engine light turn on. I purchased a code reader from Ebay, found it was a P0135 code turning on the MIL (Malf. Ind. Lamp which is techogeek for the Check Engine light). I purchased the Bank 1, Sensor 1 oxygen heat sensor (which is what the P0135 indicates has a problem) from the local Lexus dealer, which tested at 14 ohms between the two black leads, which is what a new one is supposed to do. According to the service manual, 11 -16 ohms at 68 deg. is within spec. The the old sensor tested totally open (infinite resistance) across the same black leads. After replacing the sensor, I erased the code, which turned off the Check Engine light, and the Oxygen Heat monitor ran to completion without turning on the MIL, problem solved. :D Now to my question..... Even before I replaced the oxygen sensor, the © monitor (Catalytic Converter Monitor) would constantly be running (flashing in the display of the EQUUS code reader). I presumed before replacing the sensor, that it would be set (finish the monitor cycle) once the oxygen sensor was replaced. However, that is not the case, I've driven a couple of trips since replacing the sensor and that thing just keeps running. It may just be a matter of running more trip cycles to set the monitor, but I'm now wondering if other ES300s have the same problem or if it is normal that the monitor never stops. Anyone had a similar experience?

I have a 95 ES300 w/122,000 miles. Since around 90,000 a noise started when I go over small bumps, pot-holes, etc, where a metal-to-metal rattle occurs. It sounds like the source of the noise is in the trunk. It makes the car feel and sound cheap, which otherwise has been performing well.:chairshot: I'm sure the source is probably the struts or bushings or something, but it is hard to diagnose as it doesn't happen when you simply push the rear bumper up and down. I've not tried replacing the struts as I don't want to just start replacing things if I can narrow it down first. Has anyone else experienced a similar problem? If so, did you fix it? What was the source?