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View Full Version : Both o2 sensors are gone



vip09
04-13-2007, 06:47 PM
So both of my o2 sensors are bad. I'm getting P0135 and P0141. Also getting P0300 (random cylinder miss-fire) which I think is due to both o2 sensors being bad. Will this cause any performance issues having neither o2 sensor functioning?

BTW: This is on the '01 GT-S of course.

PhillyDRFT
04-13-2007, 06:51 PM
Yes, replace them.

zmile06
04-13-2007, 09:18 PM
First thing you do is put a good transmission in the celica... One without plastic gears... :: cough ::

PhillyDRFT
04-13-2007, 09:38 PM
First thing you do is put a good transmission in the celica... One without plastic gears... :: cough ::

I didn't realise he asked a transmission question.

farqy
04-13-2007, 10:02 PM
If you can drive your celica without noticing a difference with the oxygen sensors broken, maybe they aren't broken. When my oxygen sensor went, it drove terrible, and ridiculously rich. Got terrible mileage and idled worse.

grayscale
04-13-2007, 10:35 PM
1st question is, how do you know they are gone?

vip09
04-14-2007, 09:16 AM
DTC calls for oxygen sensor heater circuit malfunction.

vip09
04-14-2007, 09:20 AM
First thing you do is put a good transmission in the celica... One without plastic gears... :: cough ::

:rolleyes: Get a life, troll.

85gtsblackman
04-14-2007, 01:20 PM
its a 3s things are supposed to break,knock, and blow hgs


just kidding


maybe

:hehe:

vip09
04-14-2007, 05:52 PM
its a 3s things are supposed to break,knock, and blow hgs


just kidding


maybe

:hehe:


This thread wasn't about a 3s-gte.

grayscale
04-14-2007, 05:54 PM
Will this cause any performance issues having neither o2 sensor functioning?
Back to your original question, I'm not sure how sensitive the new motors are to not having an O2 but in general you may experience poorer gas mileage, fouling plugs, stumbling or hestitation at lower rpms and so on. If you are getting a random misfire code that you think may be caused by this then maybe it's a bit more serious. Your pre-cat sensor is more important than the other but you need to replace them both if possible. If the only problem is that the heater element is bad, then your sensors are still functioning properly, they just aren't being preheated at a cold start. If you could expand on the 135 and 141 codes we may be of more help.

vip09
04-14-2007, 06:39 PM
http://i36.photobucket.com/albums/e6/vip09/p0135.jpg


The car runs horribly when it's cold. Bogs really bad to the point where it wants to stop running almost. I can smell gas fumes often while driving.. so I think it's running pretty rich. I took my wideband out so I don't know how rich it is running. I've been getting about 380miles per tank.. I usually get over 400 miles per tank.

CandianCelicaGT
04-14-2007, 06:41 PM
Give over your first born and replace them. You shouldn't be driving it with both gone, you're computer is probably having a shit fit trying to run on OE parameters.

85gtsblackman
04-15-2007, 12:19 AM
This thread wasn't about a 3s-gte.

ok fine

its a 2zz, its supposed to knock, snap cranks, break lift bolts and have other lil misc failures that makes older gen toyota owners go omg toyota didnt really make this did they.....

just kidding

mayyyyyyyyyyyybe

:ohyeah:

anywhizzle, yeah replace sensors go from there, when i work at yota i remember that code, usally it was the 02, 1zz did that too, they would both fail at the same time

one time it kept happing to this o1 gts i was working on, ended up replacing ecu..........under warrenty......sucked hard core

vip09
04-15-2007, 09:28 AM
I have a spare ECU, so that wouldn't be a problem.

85gtsblackman
04-15-2007, 01:09 PM
try that as a last resort

donteatbugs
04-15-2007, 09:48 PM
you should have spare o2's on that engine to huh?

vip09
04-15-2007, 10:19 PM
you should have spare o2's on that engine to huh?

Yeah, I have two spare o2's. One of them is seized into the exhaust though. I'll let it soak in some PB for a while then give it another try.