Check engine light is on. ran codes and shows o2 sensors. replaced o2 sensors and still showing the same codes

i have replaced an O2 sensor and had similar failure after 1500 miles.
I removed it, chkd it, reinstalled it and it ran fine.
P0133 is related to slow response of O2 sensor. P1134 is mfg specific so google that for ur car.

Check your fuse and replace any that are burnt out. It is possible that it your heater on your O2 sensor shorted that it blew the fuse.

Are you sure it is a code 28? I only ask because my book doesn't show a code 28 in regards to this problem. I show codes 25 and 26 that may relate to this problem. But before replacing o2 sensor, there are other probabilities for this code showing up. They would be: Injector or injector circuit, Coolant temp sensor or circuit, Air temp. sensor or circuit, Airflow meter, Cold start injector, ECM (Electronic Control Module- THE BRAIN) Or the o2 sensor of course. Plz save your money before purchasing o2 sensor and check possible related items first.You may find o2 sensor is not at fault. Hope this helps.

I called Kia about my check engine light and I told them my mechanic
read the computer and it says 02 sensor. She told me Kia does not sell out there codes to the computer in our cars and that I would have to take it to a Kia repair shop to get the correct reading form the computer

P0134 and P0154-o2 circuit not actively detected-bank 1 and 2, side 1

Nissan TSB Reference # NTB02-015 (in canada). Might be a similar TSB in the US-also this;



It does sound like it is an electrical problem, possibly in a harness (damaged) or the ECM had major issues that a reflash could not overcome.

Take the vehicle to any auto parts store that offers to read the fault codes with a scanner for free and find out what that code is. If it shows Upstream or Downstream O2 sensor replace the O2 Sensor. There is a catch, dodge had an issue in the 2000 - 2004. The ECM will show a fault code that indicates the Catalytic converter is faulty. This is actually a faulty Downstream O2 Sensor. If you get a Catalytic converter fault code replace the O2 sensor first if you still have the problem then replace the converter.

This may sound stupid but have you checked your fuel cap? I have had a fuel cap cause that misfire code before. Either way its a cheap test. Good luck

How long did the car run before the light cam back on? I don't know what type of OBD tester you have, Does it show the values of the O2 sensors.

are you sure that it is still the O2 censor? are you assuming because the check engine light is still on? because you have to reset it after fixing something you just disconnect your battery completely for a bit like 15mins and then reconnect it and the light should go away.

Most likely replacing the O2 sensor will fix this code, but that is not 100%, it could be other issues like a vacuum leak or a MAF sensor. The O2 is the one in front or on the engine side of the catalytic converter.