How do you test for error codes
O2 Sensor problem FINALLY SOLVED!!!!!!!!!
Racer
Joined: Apr 2006
Posts: 1,375
Likes: 89
From: Toronto, Ontario
I had my CEL and TRAC lights, so I went to the closest local shop to see what code was being thrown up. Sure enough, 25.
I was then told that this was an expensive fix because a "Lexus" oxygen sensor is very expensive. I wasn't planning to let this shop do the work on my car, but I stayed around, just to see what they would quote me. After about 10 minutes on the phone, he said the "best he could do" was $394 per sonsor. Including labor, I think he wanted around $960 to replace the two. What a joke.
Thanks to the intra-web I found out what I needed were two Denso Sensors that go for around $90 each. I bought the sensors when the car was in storage, but since then the CEL and TRAC lights have never came on since. I brought the car to a friend's garage, plugged it in and it didn't throw up any codes. Any ideas on how this fixed itself?
I figure I might as well replace them now that I have new ones.
I was then told that this was an expensive fix because a "Lexus" oxygen sensor is very expensive. I wasn't planning to let this shop do the work on my car, but I stayed around, just to see what they would quote me. After about 10 minutes on the phone, he said the "best he could do" was $394 per sonsor. Including labor, I think he wanted around $960 to replace the two. What a joke.
Thanks to the intra-web I found out what I needed were two Denso Sensors that go for around $90 each. I bought the sensors when the car was in storage, but since then the CEL and TRAC lights have never came on since. I brought the car to a friend's garage, plugged it in and it didn't throw up any codes. Any ideas on how this fixed itself?
I figure I might as well replace them now that I have new ones.
Driver School Candidate
Joined: Oct 2005
Posts: 49
Likes: 0
From: NY
I used the denso Universals and so far no Codes or track or engine light but Its still burning alot of gas. I have 113K on a SC300. I wounder if I should have used the ones that have the plug already attached. The densos I used are speced for the lex
Rookie
Joined: Mar 2009
Posts: 97
Likes: 0
From: MS
Do you have a write up yet? Does anyone have a diagram of where the O2 sens are?
Best place I have found to order the replacement O2 sensors is rockauto.com
Driver
Joined: Oct 2007
Posts: 101
Likes: 0
From: NJ
Vinny,
Good thread. I too have been getting those codes with TRAC, Trac Off and Check Engine. I took it to my non-dealer mechanic and he said that he couldn'rt read the codes, as my 95 SC400 does not have an OD-B2 plug for the scanner. So what scanner do you use? Where does it connect, etc?
I took the chance and had him replace the front O2 sensors, but it didn't fix the problem. I really don't want to do the dealer thing, but I may have to, as its coming due for inspection.
Scott
Good thread. I too have been getting those codes with TRAC, Trac Off and Check Engine. I took it to my non-dealer mechanic and he said that he couldn'rt read the codes, as my 95 SC400 does not have an OD-B2 plug for the scanner. So what scanner do you use? Where does it connect, etc?
I took the chance and had him replace the front O2 sensors, but it didn't fix the problem. I really don't want to do the dealer thing, but I may have to, as its coming due for inspection.
Scott
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Brett Foote
Driver School Candidate
Joined: Sep 2009
Posts: 9
Likes: 0
From: or
I don't have a code reader - YET - but the code the dealer gave me told me that the "front sensor was reading out of range. . . I replaced it but the check engine- light did not just go out. I emailed the service tech advisor [a breauacy at the car dealer - no less] he said to "disconnect the battery for several seconds. Do that sound about right?
Rookie
Joined: Mar 2009
Posts: 97
Likes: 0
From: MS
TPS?
Okay from what I can see, there are a total of 4 O2 sensors to replace; 3 before the catalytic and 1 after? Which ones to change?
Also, how many wires does the front O2's have, 2 or 4?
Okay from what I can see, there are a total of 4 O2 sensors to replace; 3 before the catalytic and 1 after? Which ones to change?
Also, how many wires does the front O2's have, 2 or 4?
Last edited by carbophat; Dec 21, 2009 at 07:20 AM.
Rookie
Joined: Mar 2009
Posts: 97
Likes: 0
From: MS
Follow up: the Front Driver side had to be replaced 2x's within a month. I used a universal the first time and then a direct fit the second time. Now it's throwing the same code again. What gives.. there has got to be something else wrong?
Rookie
Joined: Mar 2009
Posts: 97
Likes: 0
From: MS
Still getting a code 21 Oxygen Sensor any ideas after replacing it 2x's in a row?