Confusing P0135, P0053, P0030 Help Please.

[Pseudotropheus]

Upstream O2 sensor. Heater circuit resistance Bank 1 sensor 1. Car has a production date of 08/06. Car is in MPH but does have a Canada Maple Leaf sticker on inside of door.

Checked for emissions fuse or O2 fuse in the under hood and passenger side kick panel. No emissions fuse or relay showing inside both of these fuse panels. I pulled every 10 amp fuse on the car and not a single fuse is blown.

I replaced O2 with an AM Bosch sensor. Codes comeback. The car is getting the intermittent stumble like its missing when it is cold. Wiring looks good. No breaks or cuts visibly present. It is routed away from exhaust, so no melting of harness.

I am starting to get frustrated with this thing. Scanner shows no other codes or issues with vehicle.

Anybody else experienced this? Could I have gotten a bad sensor? My multimeter isnt a Fluke it is a Matco and is not responding well to bench testing the sensor. Voltages all over the place.

 

[Chuzz]

How many miles on the car? Is it possible that your EGR valve is clogged? You can remove it and clean the carbon off the pintle. Just use some carburetor cleaner and a knife to scrape it off with. Make sure the diaphragm is working in it. Some you can suck on the tube going to it and others you have to blow in. Check that out.

 

[zora]

P0135 if replacing the sensor didnt work it could be the harness going to the sensor
http://www.obd-codes.com/p0135

Did you look at the fuse marked EXH in the underhood box, use a ohm meter to test it.

 

[Chuzz]

You the man, zora!

 

[zora]

it's called google and reading the owners manual, nothing special