additude

OK, so I have these two codes and everyone tells me it's the O2 sensors. I buy the OEM's - Not cheap and replace them.

I disconnect the negative lead from the battery for 5 or 10 minutes, reconnect and do a drive cycle.

I still get a check engine light. I assume it's the same codes.

Did I just make an expensive mistake? What could the problem be now?

LS007

I think the #430 is your car telling you it wants to be a LS430!

Wish you luck on finding the real meaning of the codes and getting them fixed.

Lexozz

When the check engine light comes you can reset it by first turning the car off.
#2 open hood and fuse box underneath.
#3 pull 20amp fuse (EFI no.1) wait 20 seconds and then replace with same fuse as long as it not blown.

When you restart the engine the light should disappear. If you're still having the same problem in most cases it is the O2 sensors. Remember there are four to replace.

additude

Yea, I did all 4. Cost me $660 to do tax included. Probably not to bad considering I saved on labor.

I pulled the EFI #1 fuse.

Check engine went out. Same as disconnecting the neg. lead on the battery.

I'll give it a drive cycle and see how it goes.

Thanks.

LS400_96

Hey, Additude I have the same problem with my 96 ls400. I am planning to change two front O2 sensors but am not sure whether I should change them. Because people are telling me that the 95 and 96 have problems with their catalytic converters and that changing the O2 sensors will not help.

Do you still have any problems with the O2 sensors replaced? Where did you get the OEM sensors? I know that Carson Toyota is selling them for $110 and dont want to spend that much. I am thinking of buying it from www.oxygen-sensors.com. They carry sensors from Denso. I think the Toyota sensors are from them to. Do you know if they are the same ones?

LS400_96

Yeah, pulling the EFI 1 fuse will definantely turn the Check Engine Light (CEL) off. This is faster than taking the battery terminals off for a few minutes.

additude

Hummm,

Well they told me after they replaced the cats that the old cats were getting so hot they were burning up the sensors.

But I don't know how "True" that is because the "Invoice" didn't show any O2 sensor replacements.

Also, I didn't drive the car that far on the new sensors before I got the check engine light.

Of course the car needs to go through one drive cycle, which is about 5 miles. Turn the car off then drive it back 5 miles and see that the check engine light does not come back on.

Who knows, my original 4 sensors may still be good because it was the cats that were bad.

I didn't to the after market sensors because it required splicing in the connector. I just didn't want to spend the time doing it.

Also, you can get the sensors out with either a 5/8 or 7/8 (I don't recall which) box end wrench.

LS400_96

So, basically your cats were the ones that was mainly causing the CEL to go off. How much did you get it replaced for?

additude

It was under warranty, but the internal invoice was $2,076

Wide LS

WOW that's alot!