p0031 CEL ... WTF!

[Pyr0TeK]

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?

[lilpoindexter]

I guess it's time to check the heater wiring going to the sensor...I'd look for any obvious fraying under the hood first.

[prof15]

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?

is that an universal 02 sensor? if it is check the heater wires to see if they are connected well.. I had a similar problem, after installing an universal o2 sensor. One of the heater wires got loose and it threw the same code you got. I reconnected all the cables so now I just need to wait and see if the cel comes back.

[Pyr0TeK]

Replacement sensor is not OEM but it does have the plugs so it is not universal. I'll check all he wires when I get a chance.

[prof15]

any luck with your problem, is it still the same?

[Pyr0TeK]

Same but I have not had a chance to trace/check all the wires... should be fun.