Leftlane

Just recently got my car- I'm in the process of getting it "on the road" unfortunately yesterday I failed my emmission test. I also noticed I am getting real shitty gas mileage... tech did a quick "once over" and told me my 02 sensor is gone which could be the cause of the shitty mileage...


Noob questions:

• Is there a front and rear o2 sensor?
• If so are they interchangeable?
• Is there a DIY? (I looked and found everything but)

Thanks for your help- I really want to get this car on the road!

Edough

coincidentally enough, I went to partsource yesterday, as I've had a CEL for almost as long as I've had this car (4 months-ish). Turns out I got a bad o2 sensor.

anyhow, they are quite costly if you get a plug and play one, or you can get a generic one and splice the wiring.

Here's a DIY http://www.miata.net/hakuna/0004/h0001.htm

edit- partsource said $200 ish for a PNP o2 sensor. I've googled around and it seems to be 20-60$ for a generic o2 sensor where you have to splice.

also, I believe there are 2 o2 sensors, one before and one after the cat.

Leftlane

Thanks for the reply and link to the DIY.... hopefully this does the trick otherwise I have to replace the cat as well.... what a pain in the ass~ I have never failed an emmissions test before....OBD II code comes up as PO#420.... which could be:

• REAR O2
• CAT
• FRONT O2
• Plugs (can impact from what I've been told)

3MiataFamily

Only one O2 sensor up to 96...then they added the second one.

nighthawk

got mine for 16 bucks then spliced the wire. much cheaper then 200 for a PnP sensor.

kung fu jesus

+1 on the splice in unit. IIRC, the bosch units even include the splice connectors.

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nighthawk

^ yup. connectors make it very easy.

3MiataFamily

The Bosch piece is what I have on mine..and on my daughter's Protege...and on my son's Miata...