jigger

4 cylinder 2000 Civic with 6,700 miles. Check engine light is on. AutoZone read codes PO136 & PO137. Both codes are for oxygen sensor 2 in bank 1. PO136 says a malfunction exists in electrical circuit for the sensor. PO137 says input voltage from sensor is too low for current operating conditions. Because car is driven so seldom, I'm not concerned about poor gas mileage. Car is running fine so fuel mixture must not be lean. Dealer quoted $220 to replace sensor and said engine isn't being damaged as long as fuel mixture isn't lean. I don't want to spend money to replace sensor. Will there be any problems? I've read some posts about overheated oxygen sensors melting in the catalytic converter?

BuiltforSin

Don't be cheap and fix it. Before you know it your cat will go out. 2000 Civic with less than 7,000 miles? Is it all original? I demand pics.

vtecb18c

if your not worried about you car running like crap down the road than brush it off and forget it but i would recommend replacing the 02

BryanM.

iTrader: (1)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mugenej8power &raquo;</TD></TR><TR><TD CLASS="quote">Before you know it your cat will go out.</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jigger &raquo;</TD></TR><TR><TD CLASS="quote">Both codes are for oxygen sensor 2 in bank 1.</TD></TR></TABLE>

Maybe I've had too much to understand. 02 sensor #2 in bank 1??? Is that the 02 sensor downstream of the cat converter? If so that sensor's sole purpose is to monitor if the cat is healthy and doing it's job correctly - it has nothing to do with fuel dosage.

jigger

Sorry for the delay in replying. I was looking for the AutoZone report. It says oxygen sensor 1 is closest to the cylinder head before the catalytic converter, while oxygen sensors 2 & 3 are located further downstream and are typically mounted in or after the catalytic converter. It also says bank 1 identifies the location of cylinder while bank 2 identifies the cylinders on the opposite bank. Clear as mud?

jigger

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mugenej8power &raquo;</TD></TR><TR><TD CLASS="quote"> 2000 Civic with less than 7,000 miles? Is it all original? I demand pics.</TD></TR></TABLE>

The mileage is accurate. The car belongs to a senior citizen. Everything is original.