hornsfan10609
Certified Mazda Tech
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- 2003.5 Mazdaspeed Protege x2
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?