How do you replace a oxygen sensor?

Oxygen Sensor

1999 Daewoo Lanos 1.6L MFI DOHC 4cyl

The Oxygen Sensor is located: Under hood, driver side, lower engine area, above exhaust pipe flange, mounted in exhaust manifold,don't have a picture.Here's a link to what it look's like just remove the electrical connector,get a open end wrench and remove.. http://www.autozone.com/engine-management/oxygen-sensor/bosch-oxygen-sensor/daewoo/lanos/1999/4-cylinders-6-1-6l-mfi-dohc/4971_102074_1784_97999

Usually just aft of the flow sensor....

two codes are for an oxygen sensor & the 452 for the evap system

Google OBD2 Systems followed by the code

There is a second one in the exhaust pipe after the converter.

Sounds like the Oxygen sensor in the exhaust may not be working effectively. Check the connections and wiring running to it. The Oxygen sensor only starts to work when hot so be careful. The sensor outputs a pulse of voltage when the engine is running. If the voltage output is steady then it needs replacing.

replace the camshaft sensor with a new one, you cannot fix it.

that's the o2 sensor code. it should say catalyst efficiency. you either need to replace one of your o2 sensors ($52 at autozone), or it could be your catalytic converter.

214 is out of spec ,it will not pass an inspection here in spain thats for sure .Must be lower than 2 .Only soloution i know off is to change the cat and the oxygen sensor ,and not forgotting to take the air filter out for the test

they come as a whole assembly hub and all

have you changed the ignition wires? perhaps firing order crossed? if not coil pack or ignition wires faulty how do you know it is not "FIREING" on 1 & 4 have you tested it with a spark tester tool???