you'll need some penetrate (i prefer zep45) an open end wrench. disconnect the wires and try to break the sensor free if it wont budge you can use a torch to heat up the surrounding area and then try again.
It has two. They must be replaced, not cleaned.
Depending on which sensor, IS it sensor 1 or 2
where is the oxygen sensor in a 2004 astro van
Where is the o2 sensor on an o4 hyundai sonota 4cyl bank1 sensor2
The 2004 Dodge Intrepid oxygen sensor can be found on the back of the air cleaner housing. Remove the wiring harness. Remove the oxygen sensor retaining screws. Reverse the process to install the new oxygen sensor.
To change the oxygen sensor bank 2 sensor 2 in a 2004 Mitsubishi Endeavor, first, locate the sensor, which is typically found on the exhaust pipe after the catalytic converter. Disconnect the electrical connector from the sensor, then use a wrench or oxygen sensor socket to unscrew and remove the old sensor. Apply anti-seize compound to the threads of the new sensor, install it by screwing it in, and reconnect the electrical connector. Finally, clear any diagnostic trouble codes and test drive the vehicle to ensure proper operation.
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To change the oxygen sensor on a 2004 Ford Freestar, first ensure the vehicle is turned off and cool. Locate the oxygen sensor, which is usually found on the exhaust manifold or downstream in the exhaust system. Disconnect the electrical connector and use a wrench or O2 sensor socket to unscrew the old sensor. Install the new sensor by threading it into place, reconnect the electrical connector, and clear any fault codes if necessary.
You need to take a wrench to loosen the oxygen sensor, then you will need to disconnect the cord. Once you have done that you will then pull out the old oxygen sensor.
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Bank 2 is on the passenger side of the vehicle. Sensor 2 is down stream ( behind ) the catalytic converter. Second sensor from the manifold. May have 4 sensors.
For the 2.2 liter, there are two. One is a pre catalytic converter sensor, and the other is post catalytic converter. They are very easy to access and replace.