O2 Sensor Question. I NEED INPUT!

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chizychiz

Well-known member
Jun 8, 2004
139
0
Louisville, KY
Got a question for all you guys. Will running throttle body cleaner, or gas treatment through an engine fail the O2 sensors. Here's the deal. A few weeks ago I pulled my intake apart and cleaned the throttle body with throttle body cleaner (the kind in the spray can), and now my "service engine soon" light is coming on. I have reset it 3 times, but it continues to come back on. I also ran a bottle of gas treatment through it. I'm thinking it has to be one of two things. A failed O2 sensor or a bad MAF sensor. What is your opinion on it. I would hate to take it to the dealer to run Testbook on it, since Land Rover of Louisville is now charging $100 and hour to run diagnostics. I would appreciate the input.

thanks,

*J*
 
jsonova99

jsonova99

Well-known member
Apr 14, 2005
1,683
0
47
Snow Hill, MD
chizychiz said:
by the way, its a '99 DII if that matters.

*J*
Click to expand...

I have a '00 and I periodically run the Chevron w/ Techron gas treatment in mine and have never had a problem. What type of treatment was it?
 
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cacflyer

Guest
related to mileage more than anything else

I've run seafoam with no problems re: O2 sensors. The O2 sensors are going to fail sometime around 90K or later no matter what... I think there are three of them, all available on the web. You might as well replace them all yourself and forget the dealer! I did not do that, paid way too much and learned later how easy it was to find the parts and replace yourself!
 
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chizychiz

Well-known member
Jun 8, 2004
139
0
Louisville, KY
No, I have actually just been reseting by disconnecting the battery cable for about a half hour. It resets it, but Once I drive it for about 15 minutes, the light comes back on. I'm thinking it is a MAF sensor on the intake because I had the intake apart the day the light came on, and I am sure that I probably knocked somthing loose. It only has 60k miles on it. I can only assume that since nobody has agreed that maybe the throttle body cleaner has faulted a O2 sensor, then they are probably good. Unless by coincidence one has decided to go out. The intake is the only thing that I had my hands on at the time.

*J*
 
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Meisterbr?wn

Well-known member
Jul 20, 2004
252
0
48
Longview, WA
FYI -
I just replaced the MAF on my Disco a couple weeks ago - it went out at almost exactly 60k. I tried removing it and cleaning with electronics cleaner a couple times, but it was a goner. I could clear the code, drive it for a few days, but the SES light invariably came back on. Since I replaced the MAF I haven't had any issues.

I bought an Equus Innova code reader at Schucks for $130 with a $30 mail in rebate. It's been a good investment so far. Without knowing the exact trouble codes, you can waste a lot of time and money replacing stuff that works. If you can swing it, I recommend picking one up.
 
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chizychiz

Well-known member
Jun 8, 2004
139
0
Louisville, KY
Good idea! Another questions for you. I was told that when you change the MAF sensor, that you have to reprogram it using testbook. Does anyone know if that is true? Sound bogus to me.

*J*
 
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Meisterbr?wn

Well-known member
Jul 20, 2004
252
0
48
Longview, WA
Well, I don't know if I was "supposed to", but I sure didn't reprogram anything. I just swapped the two out. I can't think of anything that would need to be reprogrammed, but I haven't done much work on cars before.

Who did you hear that from? Maybe someone with more experience will chime in here, but it sounds bogus to me.
 
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Meisterbr?wn

Well-known member
Jul 20, 2004
252
0
48
Longview, WA
I got the Equus 3100, Schucks is part of the Checker, Schucks, Kragen Auto Parts stores (it's the "Schucks" brand here in the great NW).

Here is their web site - note the code reader is their front-page special ($114.99)
http://www.partsamerica.com/Default.aspx

If you have one of those stores in your area, you should check with them instead of buying it online. They might still have the $30 mail in rebate...I thought the rebate was good for the entire month of April.
 
RWF

RWF

Well-known member
Mar 10, 2005
132
0
Colorado
Here in Colorado Checker auto parts has the same code reader fo sale. Autozone will also hook you up for free w/their code reader and tell you what's up.
 
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Meisterbr?wn

Well-known member
Jul 20, 2004
252
0
48
Longview, WA
RWF said:
Autozone will also hook you up for free w/their code reader and tell you what's up.
Click to expand...

Oh yeah, what he said. It looks like there are a ton of Autozone shops in Louisville, so you should be in luck. We don't have Autozone up here, so a code reader was the way to go for me.

Another argument I'll make for the code reader is convenience. If you're dealing with codes a lot, I can see it becomming a pain in the ass taking the Disco to Autozone every time to get the codes read, but that's your call.
 
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chizychiz

Well-known member
Jun 8, 2004
139
0
Louisville, KY
Well, last night (on a long shot) I changed the air filter hoping that might have something to do with it, and then cleared the code. So far it hasn't come back on today and I have driven about 25 miles so far today. so maybe, just maybe, that took care of it. Its probably to good to be true.

Thanks for the help guys!

*J*
 
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