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post #1 of 21 (permalink) Old 07-14-2003, 01:21 PM Thread Starter
 
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All from O2 sensor?

This is from my other post.
21** O2 sensor
25** Open or shorted condition detected in one or more of the idle air control motor circuits
52** Rich air/fuel mixture has been indicated by an abnormally lean correction factor

Can the Oxygen sensor be causing all three codes? I know codes 21 and 52 are O2 related. But isn't code 25 because of air intake. I changed the filter but I am now wondering if I need to just reset the sensor or if I am getting a blockage.

Has anyone put in one of those newer Intake Air Coolers that can be rewashed? Supposedly allows for better air flow and mileage...

Let me know.
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post #2 of 21 (permalink) Old 07-14-2003, 01:24 PM
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No. The IAC is this:

(Picture stolen from EDF's howto on cleaning your IAC)
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post #3 of 21 (permalink) Old 07-14-2003, 01:33 PM
 
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yea.. an O2 CAN do that.

the computer adjusts the IAC based on how rich/lean the mix is.... and the RPM. if the sensor os shorted.. it might think the IAC is b0rked at the same time.
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post #4 of 21 (permalink) Old 07-14-2003, 01:52 PM Thread Starter
 
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I guess I better replace the O2 and see what happens from there.
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post #5 of 21 (permalink) Old 07-14-2003, 01:54 PM Thread Starter
 
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Okay hypnos, what is EDF's how to on cleaning your IAC and where can I find it?


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No. The IAC is this:

(Picture stolen from EDF's howto on cleaning your IAC)
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post #6 of 21 (permalink) Old 07-14-2003, 02:38 PM
 
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psal2, did you check the O2 sensor fuse under the hood?
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post #7 of 21 (permalink) Old 07-14-2003, 03:16 PM Thread Starter
 
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No. I did not. I guess a fuse can go bad too, huh?
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post #8 of 21 (permalink) Old 07-14-2003, 09:40 PM
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I'm not sure if 1st gen has a o2 fuse or not.

Just replace your bad o2 sensor and see what happens.

If you are still getting the IAC code after you have replaced the o2 sensor, then the howto on cleaning it is on the 1st gen howto page.


BTW, when I said no, it was directed towards your air intake question.
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post #9 of 21 (permalink) Old 07-14-2003, 10:14 PM Thread Starter
 
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I guess it is O2 changing time this weekend if I get the time (work 2 jobjs). Does it make a difference which upstream or do the left bank up first?

And thanks again for the help that all you are giving. Really appreciate it.
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post #10 of 21 (permalink) Old 07-14-2003, 10:24 PM
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It doesnt matter which one you do first. Just be careful around those exhuast pipes. Its best to change the sensors after the car has sat for a long time without runing. Those pipes get EXTREMELY hot.
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post #11 of 21 (permalink) Old 07-14-2003, 10:37 PM Thread Starter
 
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I hear that. This would be a good time to get some asbesto gloves that go to the elbow.

Can this be changed from above or does below give me a better chance. I would think below. Autozone has the O2 for $34.99. A little anti-sieze compound, and the O2 tool and the job can be done for under $50 and the dealers want $125 or better to change one.

Of course, the salve for the burns that I will probably get might cost about $80...LOL (hope I didn't jinx myself).
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post #12 of 21 (permalink) Old 07-15-2003, 01:35 AM
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The ones under the cat, you want to get to from under the car. I've never looked to see where exactly the ones before the cat are.
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post #13 of 21 (permalink) Old 07-15-2003, 02:02 AM
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Quote:
Originally posted by hypnos
It doesnt matter which one you do first. Just be careful around those exhuast pipes. Its best to change the sensors after the car has sat for a long time without runing. Those pipes get EXTREMELY hot.
Yea safety wise it would be nice to work on a cold exhaust, but if the o2 sensor is siezed in the port, run the car a bit so the metal can expand a little bit.
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post #14 of 21 (permalink) Old 07-16-2003, 09:11 AM
 
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the pre-cat sensors can be easily reached from above... just need to remove airbox, etc on pass side.
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post #15 of 21 (permalink) Old 07-16-2003, 09:13 AM
 
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also, make sure the wires/connectors aren't too close to (or touching) the exhaust. if you read about some problems i was having with the charging system... it was related to the O2 connector melting and grouding out on the exhaust. it was on the same circuit as the charging system.
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