Lexus is 250 repair

Marvin

• 85242 Answers
• Posted on Apr 15, 2009

SOURCE: How to locate the oxygen sensor in a LEXUS LS430 (Bank1 Sensor1)

the O2 sensor for bank one sensor one is located between the catalytic converter and the engine in the exhaust head pipe. see photo of your engine cylinder layout, the sensor u want to replace is the one at the cylinder #1 bank on right.

SOURCE: High RPMs

yes its related to knock sensor because car is running rich in fuel, and car runs of on safe mode, so overdrive will be off. have you and a friend replace it. remove intake assembly, then intake manifold, but first remove your anifreeze from radiator, trust me you want to remove antifreeze! their are brackets by the fire wall to hold down the manifold, thats the hard part is taking it off and putting that on since not to much space to work on it. on the block you'll see the two knock sensors, has 2 wires each, knock sensors cost between 150- 200 a piece, still cheaper than dealership putting it on. also buy some liquid gasket because you will need that. after putting it all back together reset the ecu and you should be fine,

SOURCE: my lexus LS400 will not

fuse, if fuse is fine check that the ground coming off the pump is well grounded

SOURCE: I have a Lexus ES300 with a code P0420 showing a

usually the ecu never gives a code on a catalytic converter, but rather the o2 sensors. it seems much more logical that it is the o2 sensors than the cat. fixing the problem usually makes the light go away but not always, so resetting the computer is adviced. also, resetting the ecu would not change the way the car runs because it should be working normally, which means, if its running rich, the problem still exists. like i said, most likely it is the o2 sensors, especially because they go out fairly commonly. hope this helps, good luck.
p.s., if the muffler did get replaced, need high flow o2 sensors, but that depends on the muffler. also, i posted alink to a lexus forum so when ever you have problems with your car, you can ask there:
http://www.clublexus.com/forums/performance/35057-ecu-reset-remove-fuse-or-disconnect-battery.html

SOURCE: I have a lexus IS 250 - 2006 model. I posted a question on 27/05/2014 about the following error codes after doing a diagnostic. C1223 ABS malfunction, C1241 Low or high Power supply voltage, B1271 Com

look at the wiring at the rear end and check for broken wires , broken wires at the connectors , loose harness connections ,dirty connections , power at the harness plug at the ABS and ECM unit..