I bought a Kia Sephia, and after 2 days a check engine is Led, now after the emission test there is a fault P0133 which is Oxygen Sensor. How can I fix it by my self? if there is a manual on how to do that, it would be great.
The Oxygen probe is located in the exhaust manifold or front exhaust pipe it takes a 22mm wrench to loosen it and at first you need to dismantle the battery to avoid electric hazard, then the cable to the probe so it does not have any connection with the vehicle, clips and holders, after that turn the probe anticlockwise to dismantle it, and reversed operations when fitting the new one, and that should fix you problem.
The only thing that can be a problem is if the probe is rusted together to the manifold, that requires professional help.
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P0133 doesn't mean the sensor, it only means a problem in the sensor circuit signal, that can be the sensor, the wiring or even the PCM.
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