I've the same car, 2008 Toyota Yaris HB with 153,000 miles on it. I don't get any error code indicating a bad upstream oxygen sensor. Should I replace the oxygen sensor anyway? It seems like it's quite a difficult task unlike replacing spark plugs and ignition coils which are much easier.
Does the mpg's go down before getting the check engine light? My 2007 yaris used to get 38 mpg, I'm down to 33 mpg and wondering if the O2 sensor is going bad. So far no check engine light.
Many things can cause drops in mpg. O2 sensors going bad will, but usually when it goes bad it throws codes. Dirty air filters, improperly inflated tires, messing oil change, old spark plugs, brake drag, the list goes on
Or the tire store doesn't carry the stock OEM tires size and they've replace it with one slightly larger (not significantly) which is in my case and my mileage had dropped significantly.
HI MY FRIEND I HAVE YARIS 2007 SEDAN I HAVE BEEN DRIVING WITH ENGINE LIGHT ON WITH CODE P0031. I AM PLANNING TO DO SOME TESTING ON THE O2 SENSOR IF I CAN GET IT BACK TO WORK MAYBE CLEANING AND CHECKING RESISTANCE CABLE BEFORE I DECIDE TO BUY NEW ONE. IDK IF U CAN GIVE ME SOME ADVICES ? I WNNA KNOW AS WELL DO U WORK AND FIX ALL YOUR CAR WITH THE SAME OB2 SCANNER ?
should be right after this upstream sensor on the past the flange. if you are under the car, it should just be a few inches from the flange in plain sight
I've the same car, 2008 Toyota Yaris HB with 153,000 miles on it. I don't get any error code indicating a bad upstream oxygen sensor. Should I replace the oxygen sensor anyway? It seems like it's quite a difficult task unlike replacing spark plugs and ignition coils which are much easier.
If you have no error coded don't worry about it.
Do you have shop?
Does the mpg's go down before getting the check engine light? My 2007 yaris used to get 38 mpg, I'm down to 33 mpg and wondering if the O2 sensor is going bad. So far no check engine light.
Many things can cause drops in mpg. O2 sensors going bad will, but usually when it goes bad it throws codes. Dirty air filters, improperly inflated tires, messing oil change, old spark plugs, brake drag, the list goes on
Or the tire store doesn't carry the stock OEM tires size and they've replace it with one slightly larger (not significantly) which is in my case and my mileage had dropped significantly.
HI MY FRIEND I HAVE YARIS 2007 SEDAN I HAVE BEEN DRIVING WITH ENGINE LIGHT ON WITH CODE P0031. I AM PLANNING TO DO SOME TESTING ON THE O2 SENSOR IF I CAN GET IT BACK TO WORK MAYBE CLEANING AND CHECKING RESISTANCE CABLE BEFORE I DECIDE TO BUY NEW ONE. IDK IF U CAN GIVE ME SOME ADVICES ? I WNNA KNOW AS WELL DO U WORK AND FIX ALL YOUR CAR WITH THE SAME OB2 SCANNER ?
You can try using some maf sensor cleaner. I use many Obd2 scanners
I have same problem
Do you know where the downstream sensor is located?
should be right after this upstream sensor on the past the flange. if you are under the car, it should just be a few inches from the flange in plain sight
What obd scanner and apps did you use for scanning?
Thanks in advance
I used an ELM 327 bluetooth adapter with TORQUE Pro android App
@@ZeroTwoSixty thank you brother
I'm getting p0133 o2 bank 1 sensor 1 error is this the same procedure for 2008 yaris?
Might be this sensor
@@ZeroTwoSixty
How many 02 sensors on the 2008 Yaris ?
@@dfls5069Upstream and downstream.