Personally I'd want to check voltage is getting to the heater pins on the sensor s first and check the wiring back to a connect connector block. I've heard theories like back pressure and pulses sucking in air but I just picture the pipe always being above atmosphere pressure in my mind. Hey guys, I have a 2002 Lexus gs300 and I got the same problem. I would really appreciate any info I can get I am fed up with getting the run around from Toyota. Forgive me for I have sinned. I am going to look for some hi-temp exhaust wrap to keep the shield material from direct contact with the exhaust pipe. If they made a previous repair attempt ie.
Recently the leak had gotten to the point that it was becoming quite audible. Lexus Check Engine Light Codes Welcome to the Lexus Check Engine Light codes page. The bolt holding the clamp just sheared in two, it was so badly rusted. Do you guys know what I can do besides just buying another cat to replace that piece of pipe? Over the past 10 years or so I have had at least two instances of O2 failure indications. After removing shield clamp on drivers side the leak sound has increased as it is now noticable when standing 10-15 feet from drivers side.
It just seems that after the second O2 the car doesn't really know what is going on anymore. The code definitions are a good starting point when determining the cause of the service engine light but where do you go from there? Thats a plus as I did not have to fuss much with it. ££££££££££££££££££££££££££££££££££££ Oh well if I want to run my Dream Car then I have to accept the financial demands. I'm going to pull of the whole Y pipe assembly and get it on the bench to see if I can get the holes welded or patched. But just curious if anymore research has surfaced with this issue pointing out a different culprit. If light remains on, the self-diagnosis system has detected a fault in the system. I purchased a new ypipe from ebay and had a muffler shop install it.
I have not decided if I will reinstall the shields. The heat shields themselfs are not an item you can buy from lexus and after consulting with several exhaust shops and one automotive teacher the shields are strickly to prevent leafs or debre from catching fire under car. Yeah it's a cracking price ands it's Denso so don't think you can go wrong. Not sure why Lexus cheaped out here. There are no sensors to measure pressure only temperature difference. It may be as simple as a pipe crack underneath the stainless steel heat shields. The idle can often cause the car to stall and the check engine light to flash, but is intermittent in nature and can fool even the most seasoned auto mechanic.
The following pic is before I painted. Today I removed the Y pipe and secondary catalytic converter section to get it on the bench. If someone can explain this I'd love to know. Transmission must be in Neutral position. And any idea what sort of expense I am in for If I have to use my local Lexus Agent at £110 per hour I must admit I do not use a Lexus agent to service the car cost reasons but a local well established garage who has serviced and maintained it for me.
Now it was back like it was before all this trouble. The shield around the forward Y exhaust pipe is to prevent leafs or debris from catching fire. Fired up car and it was immediately more silent than before. I think electrolysis from dissimilar metals shield is stainless steel pipe is steel. Then went on to puddle weld the other areas where the shield clamps had existed and the exhaust pipe was about to corrode through. Here is how we suggest you proceed. How can you tell if you have the issue? I decided to sand the Y pipe and paint with Hi-temp paint.
How much does your service cost? They actually look ok I think at the moment. The clamp bolt is fairly rusted. I notice a gas odor, what timing! Save yourself a lot of time and money by ordering this ebay Y-pipe and take it to your local exhaust shop to have it installed or give it a try yourself. I think they're the same - need to check the part numbers. This buildup eventually breaks off and is ingested into the engine causing the intake and exhaust valve to hang open causing a partial misfire or damage to pistons, rings and cylinder walls. Washed it Sunday have to keep it clean - it's a Me-Thing. In some cases you need to pull over immediately to prevent damage while in others you merely need to tighten you gas cap next time you stop in order to reset the service engine soon light.
After reading some forums it does seem like it's still a relay issue. !! Where I live salty roads are standard all winter. I've heard theories like back pressure and pulses sucking in air but I just picture the pipe always being above atmosphere pressure in my mind. I fallen into the guilty trap of swapping parts. The new Y Pipe from ebay seems to come without the shields. That is why I thought I had a bum catalytic converter. There are no sensors to measure pressure only temperature difference.
. For a moment it creates a short backdraft vacuum in the pipe and O2 is pulled into the pipe and potentially fools the sensor. This would lead one to believe that the catalytic converter needs to be replaced which can be a major expense since your ls430 has three catalytic converters. I purchased a used 06 is250 November of 2014. Still no error codes P0420 or P0430 bank one and back two after installing ebay exhaust y-pipe 2 months back. I figured while I was at it I might as well strengthen those areas. For a moment it creates a short backdraft vacuum in the pipe and O2 is pulled into the pipe and potentially fools the sensor.