I check my CEL and I came up with a code 41, Primary oxygen sensor heater.

History, I use to have a leak behind the Cat, and that piping was replaced, but I never had a CEL.

Now I have a leak in front of the Cat, but I also replaced the head on like the same day.

Now could this code 41 be from my exhaust leak or just a problem with my o2 sensor.

I've searched and found that I can get a multi-meter and plug into the o2 sensor where the black wires are, and the meter should read between 15-40 ohms (if i remember correctly, Please correct me if I'm wrong), And if if doesn't read that I have to get a new o2 sensor.

Can anyone help me out and correct me on anything if I'm a lil misunderstood.

obd1, d15b7


Modified by 92 CiViC HB at 4:21 PM 3/14/2007

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92 CiViC HB &raquo;</TD></TR><TR><TD CLASS="quote">Now could this code 41 be from my exhaust leak or just a problem with my o2 sensor.

I've searched and found that I can get a multi-meter and plug into the o2 sensor where the black wires are, and the meter should read between 15-40 ohms (if i remember correctly, Please correct me if I'm wrong), And if if doesn't read that I have to get a new o2 sensor.</TD></TR></TABLE>
a leak will not cause this problem, unless it melted the wires.

that is the best way to check the O2 heater. all though I've seen heaters run as high as 1k ohms before the ECU calls them bad. A bad O2 heater will most likely be open.