I just had the oygen sensor replaced on my 1997 Acura CL 2.2 because it got a CEL code of 65 which which told me it was "

 

proable cause-open or short in secondary o2 heater circuit

i don't want to type the whole flow chart on how to diagnose the o2 sensor
go here (link deleted)
download the service manual for a 97 accord, look up under pgm-fi section (i think pg 11-71) and go through the whole procedure to diagnose your o2 short/open, you will need a voltmeter for this

Edit by Admin Ron A: I had to delete the link because we cannot allow links to copyrighted material to be posted in the forum.

 

I wonder if RonA has ever seen the light of day.

 

Yurhomieblaze,

can you send me the link to chriscdeleon@gmail.com

 

emailed
i know the mods just doing his mods duty to uphold the rule, but the rule stinks

 

Thanks Yurhomieblaze. It was replaced my a mechanic using a Denso brand rear oxygen sensor. Could using an non-Acura brand cause the problem. The mechanic stated that maybe it could be the catalytic converter or maybe some electrical. Please advise on this if any of this is true.

 

proably not the senosr unless its a gross mistake on the mechanics side but most likely electrical
i'd get the manual and a voltmeter and follow the step by step intstructions, it will determin what wires open/short

closer look at my service manual say it could also be the ecu but you have to go though the steps to see if its the sensor, the wires or ecu.

 

where is the ecu located?

 

Yes, using an aftermarket Denso can cause the light to come back on. I have heard this before from several people.

I'm not sure who Honda uses for the O2's, but I think its NGK or TEK. You might have to get one from the dealer or online to save some $$.