Where are oxygen sensors 1998 grand marquis? - 1998 Mercury Grand Marquis

SOURCE: 1998 Grand marquis

had same problem. the switch for the light is in the door handle mechinism. I sprayed all four door latchs with wd 40. turned out it was one of the back doors. hope this helps

SOURCE: '97 Grand Marquis needs a new Oxygen Sensor

its simple to do. just unplug the sensor and unscrew it. if its frozen and hard to break loose, then just heat the base the part of exhaust that it goes into.

SOURCE: How to replace Oxygen Sensor for Mer Grand Marquis

• depending on which O2 you need to replace, bank one upstream
• bank two upstream
• bank one downstream
• or bank two downstream

it will be easier if you have an O2 socket

Basically you just disconnect the sensor
turn the old one to the left
and remove

However, expect to use a lot of muscle and possibility some heat too

These things get tight

Sometimes you even have to break out the big pipe wrench

If you are really lucky you can remove them with a standard 7/8" wrench but I wouldn't even try it since more often than not you will just strip the head

SOURCE: WHERE IS THE OXYGEN CENSOR

O2 sensors are located in the exhaust manifold near the Catalytic converter.
Some cars have the 02 sensor before the catalytic converter, some behind, and some before and after.

Simply locate the "bung" that contains the O2 sensor, and you will see the sensor connected to wires.
This is the best way to locate them.

-Jackson
http://urbanscooters.com/

SOURCE: Where is the coolant temp sensor located on a 1998 mercury grand marquis LS?

Hi Carnell,here's a link to your cts. Where is the coolant temp sensor located on 1998 mercury grand marquis LS...