BAD OXYGEN SENSOR PO137 CODE>>LOW VOLTAGE BANK ONE< SENSOR 2

Hi TY
Thank you for your quick response. The electrical connector (4 pin) is in a very difficult spot to reach on this kia sportage. Its a downstream O2 sensor. I will check what you told me to check.
I'd also like to ask, according to the code displayed, the car is running too lean. Would a clogged or bad fuel filter give the same code?
I will check the wires and connector. This is the 2nd sensor and its giving a PO137 and also the guy said something about another code=heater.
Thanks so much for your help!

Ty
sorry to bother you, but where is the computer located on this car. It looks like there are a few different. Ones under the dash. But not certain where the main one is that the downstream O2 sensor goes to. Could a bad fuel filter cause it to give this cade, or is the code specific for an OXYGEN SENSOR. It said banl 1, sensor 2. Replaced the downstrem 2x as I said, still the check engine lite is on. Its really hard to reach the connector. Next to impossible to reach. Any help appreciated.

RE: 1998 KIA SPORTAGE 4 dr. Automatic trani, 2.0 liter engine. Code PO137
CHECK engine lite on

GOOD MORNING TY
very hot here in Florida. NOt good temp to work on cars! In Florida. I looked under my 1998 KIA sportage hood for the fuse box u told me to check for the PO137 ERROR CODE. Check engine liight on. YOu said to check O2 sensor FUSE, but all I see are the following: I see EGI MAIN, FUEL PUMP, FUEL INJ, ADD 30 amp. MAIN 80 amp, BTN 60 amp, IGN 40 amp, P/window 40amp, then MAIN 15 amp, ABS 30amp, and HEAD 20 amp. THE EGI MAIN AND FUEL PUMP look like relays. The rest look okay.
I just hate to keep spending $ on O2 sensors. I also don't hear any exhaust leaks. The rear tailpipe fell off, but we had it replaced. The exhaust shop didn't say anything about a ln exhaust leak.

Someone else told me to check the COOLANT TEMP sender. What would that have to do with a PO137 code?
The wiring looks too complicated for me.I found where the computer was. Just like you said, but you can't see the wires.I have to remove everything. If I undo the battery, will it clear the check engine lite? As I said, the auto store cleared it, and the code came back a few minutes later while, driving.
Thanks for all your Help. Gail

TY I took it to a shop. Put it on a ift. They said the new downstream O2 sensor had NO voltage going to it. Just like oyu said, its something in the wire harness or computer itself.
There is suppose to be a PASSENGER SIDE fusebox with 02 sensor fuses in it.I can't find the location.I see the one under the hood and the fuse box on drivers kickpanel, but I can't find the box on Passenger side with O2 sesor fuses. Wanted to check them. Do u know where I can find that box.I see the ECU under the carpet on passenger side, but NO fuse box. Any help appreciated.

Hi Ty. Yes, I found the fuses jjust as you said on the drivers side. The both O2 fuses were good, as well as the ECU fuse. Can you please explain in simple terms how to check them. Do you have to have key one, or just accesory key on and what and how many volts are you checking. Many thanks.
The mechanics said it would be too costly to fix and trace the open, but hopefully I will find a short or open as the downstream O2 sensor is getting NO voltage. They said it would be ok to drive but gas miles might be affected.

I have a multi meter and test lite. You also said to leave fuses in?
Thank you so much for all your help. I think this is gona be a hard on to fix unless I was a Master mechanic like you.
Alos, excuse any typos. This keyboard doesn't work well.
Thanks so much! Gail
we have a brutal heat wave here (florida). Phew

Hi Ty.I really, really appreciate all your help. Assuming you are using the inside of the cig lighter as a ground, the meter is reading a weird voltage =177mv on both 02 (10 amp fuses). I am putting the red positive end of test lead on top of each O2 fuse. Unless I am not connecting the leads right, something doesn't read write as voltage?
I may retry again as it raining

Happy Labor day, TY. Sorry to bother you but do email when u get a some free time. I put the car key in the "ON" position and still get @ -177 mv (that is a MINUS) on all 4 metal tabs of BOTh O2 sensor 10 amp fuses. Its so hot its next to impossible to do anything in this heat.I had my meter on battery load test 12 volts when I used it. I don't know if these readings are bad or what is causing this. I will use a second meter and recheck again. Thanks!

Ty I tried another meter (CENTECH). Attached black wire to COM, and red wire to VohmmA.
I hope that is correct. NOW I get zero volts on BOTH 02 sensor fuses. In all 4 locations. What could be causing this?
Gail.I set the meter on DC 20VOLTS

TY looks like the fuse pump RELAY turns or passes 12 volts to both o2 sensor fuses
is the relay bad? Or does car have to be running to check for 12 volts at these fuses?

Hi TY
The 2 kia sportage relays were the same part # and both 30 amp. I swapped them out as you said. Still no voltage to both O2 sensors FUSES.
I really appreciate all your help here. My dad was a service writer and passed away, so I miss his help fixing cars. I hope with oyur help we can figure this out.
Gail

TY, do u have any idea what could be the problem on this? Where does the power come that comes into this O2 sensor fuses. From the battery or computer?
I don't know
where else to trace. Does this mean the 2 connectors to the sensors themselves aren't getting 12 volts?
Thanks

TY. YOu said you attached diagnostic steps, but I don't see anything. Just 2 pictures of wiring. Can you send me that attachment "98kiasportagePO137"?You can send attahcemnt to: rnhib@att. Net
that is my email. Thanks
I will have to trace that blue/black wire you mentioned. Does the car have to be running to check O2 Fuse power to both fuses, or just run position(key)
thanks

too hot to work on it outside!

TY
okay, I decided to try to check both (1998 KIA SPORTAGE) O2 sensor fuses with car RUNNING and both show voltage in all 4 spots(metal tabs). When ignition switch is is the "RUN" position, there is NO votage to both O2 sensore fuses, but with car running, there is voltage to both O2 sensor fuses. Don't know where to go from here.
Thanks