What have you done to your P5 today?

I got my first check engine light in the P5 yesterday and it is a P0031, low voltage O2 sensor heater element. I ran seafoam through my engine last week and am worried that may have something to do with it. I cleared the code and it came back so I guess I will just buy a new O2 sensor. I found this post and now i'm wondering if it was because of the seafoam.
Ok... I have replaced my upper O2 sensor 3 times now and I am still throwing a p0031 code low heat element. I have tried two different types of O2 sensors also so I am pretty damn sure it is not the sensors so I have to look elsewhere. The plug appears to be be fine where it connects also. Could it be the replacement PCV valve I put in it a while back? Maybe a bad wire? I don't want to bring this to the dealer and get reamed for them hooking it up to a computer. Seems this happened about a year ago a couple weeks after I had SeaFoamed my engine. Could that have done something? Ideas?
 
Driving my wagon after work to go pick up some brand new weisco pistons! ;) 9.1:1 87mm for S13 vert! And fixing my head so I can finally have a built sr. Awesomeness.
 
I ran the seafoam through the brake booster vacuum line. I guess it does **** with O2 sensors because it ruined mine. I got a universal Bosch O2 sensor today for $60 and so far it works like a charm. I know most people do not like Bosch but the only other brand they carried was Denso and it was over $200.
 
I ran the seafoam through the brake booster vacuum line. I guess it does **** with O2 sensors because it ruined mine. I got a universal Bosch O2 sensor today for $60 and so far it works like a charm. I know most people do not like Bosch but the only other brand they carried was Denso and it was over $200.

I like Bosch (thumb)
 
I ran the seafoam through the brake booster vacuum line. I guess it does **** with O2 sensors because it ruined mine. I got a universal Bosch O2 sensor today for $60 and so far it works like a charm. I know most people do not like Bosch but the only other brand they carried was Denso and it was over $200.

I like Bosch (thumb)

I agree, I have never had a problem with any Bosch products, spark plugs or sensors.

I've used many a Bosch universal O2 sensor. Never had a problem with any of em.
 
I've used many a Bosch universal O2 sensor. Never had a problem with any of em.

I was a little leary of the cheap little screw connectors for the wires, but it seems to be working fine. Before my cars idle would quiver ever so slightly but was pretty stable, now that i've replaced the plugs, first O2 sensor, and cleaned the MAF and K&N filter, when it idles while it's warmed up the tach sits dead still and doesn't move at all, right at 750 rpm. I love how smooth the car is running, and I will see if my gas mileage goes up from 22 on the last tank.
 
Finally got the radio bezel done and installed...here are the pics. These are cellphone pics, so sorry for the glare
 

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I just got Continental ContiExtremeContact from tirerack for $61 each
215/40/17 to put on my Mazda 6 rims, and then I put them on the pr5. Then I put my 16" stock pr5 rims on the 6, which is my wife's car.

Now I got the 17" rims... come the new year, i am gonna do the ebay rear strut tower bar mod, and i see what else from there
 

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Here is a pic of the rear strut, the tire just barely cleared it..
The front even fit my old stock 215/50/15 michillins, but not the rear,
so i went with the 215/40/15 like another person on here did
 

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