Can you reset the o2 sensor light without changing it

Without knowing the specific Diagnostic Trouble Code (DTC) it is very difficult to troubleshoot this situation. This vehicle is capable of setting no less than 22 different DTCs for the heated oxygen sensors (HO2S) alone. Code descriptions include low voltage, high voltage, slow response, insufficient activity, and heater circuit which could be set for either the upstream or downstream sensors on either the Bank 1 or Bank 2 side. Potential problems areas would include a faulty O2 sensor, open circuit, short circuit, excessively rich/lean fuel mixture, or faulty powertrain control module (PCM)/software. You can read more about oxygen sensors here: https://www.yourmechanic.com/article/where-is-the-o2-sensor-located

Did you reset the codes after replacing the O2 sensor? It is possible sometimes that the values stored in the ECU for the earlier sensor may be giving the wrong readings. Try resetting the codes and see if it helps. Also, make sure that you replaced the part that was actually needed. If the OBD gives other codes, the problem might not be with the sensor.

I use always scanner I heard to disconnect battery for over 5 min.

The check light should go out IF the O2 Sensor
is the problem or only problem

No OBD Codes tell you what is wrong or what to
replace

if you have already replaced the o2 sensor. disconnect the negative side of the battery ,wait 30

seconds then reconnect the negative, the service light will go away, most cars have two o2 sensors

plus the catalyctic converter. if it comes back you may need to replace another one or your converter.

good luck!

You need someone with a programmer to reset it. Auto Zone used to reset at no charge but now laws have changed in some states because dealers were taking cars with check engine lights to them to have reset so they could sell cars without having to actually fix them. Hope this helps ,Good luck

Exhaust couldbe stopped up. remove the O/2 and run it for a minute with the leak and see if the power is back like it used to be. If it is change the stopped up part ( cat converter, Muffler or bent pipe) and drive on. When running with a bad O/2 the convetor can melt and cloggup ( happen all at once)

you can diconnect the positive battery cable for 30 secs. or take it to autozone they can reset it for free. try waiting a day or two the engine must go through so many cycles without any problems before the light will go out. If it doesnt go out there is still a problem. More than likely if you changed catalitic converters and the light stays on it probaly has a bad O2 sensor.

did u change the right o2 sensor there is 2 sensors on bank1 and 2 on bank2.....upstream and down stream.....i had the same prob i changed the o2 senser to the other side to check and make sure it was the o2 senser....it took 4 o2 sensors before i got 1 that finally worked nd yes i was buying them brand new.....so change sides with it nd see if the code changes sides....and did u reset it with the code machine when u put the new 1 in?

Hi

If the engine is running without any problems then The fault code which has flagged the checked engine light will either pertain to the upstream O2 sensor, a drop in catalytic efficiency, an EGR issue, or maybe even an EVAP issue.

A lot of EVAP issues can be resolved by simply ensuring that the fuel filler cap is on securely, otherwise a vacuum leak will be detected in the system and the check engine light will come on.

A drop in catalytic efficiency (P0420) is usually temporary and will stay away after a reset.

EGR issues can sometimes be rectified by removing the EGR valve and cleaning it, and the ports on the intake where it was sat, but there are occasions when it has to be renewed.

The O2 sensor issues are a wee bit different. There are a number of fault codes which relate to the O2 sensor, and which make the O2 sensor look faulty, when the O2 sensor is actually attempting to rectify a problem from elsewhere and isn't faulty at all. However, they could also be due to a fault with the O2 sensor. Basically, further checks should be made before condemning the O2 sensor should the fault code relate to the sensor.

Have a code read done and then have the codes reset and see what comes up.

Regards

Geordie