Where is the oxygen sensors located on a 2000 jaguar s-type

A LITTLE HELP! THE O2 SENSORS ARE LOCATED ON THE EXHAUST PIPE! THERE CAN BE AS MANY AS THREE OF THEM! ON A FRONT WHEEL DRIVE, THE FIRST ONE IS LOCATED BETWEEN THE RADIATOR, AND THE ENGINE TOWARD THE BOTTOM! EACH ONE WILL HAVE A PLUG IN WIRE ON THEM! THEY ARE LONG CYLINDRICAL LOOKING TUBES STICKING IN THE EXHAUST, YOU CAN EASILY SEE THEM!

the following links can assist you with causes and repair
P0420 Catalyst System Efficiency Below Threshold https://www.autocodes.com/p0420.html P0420 OBD II Trouble Code

If you check out http://www.bluejag.co.uk there you will find photographs and location info

You might check this site out for Jag codes. Oxygen sensors can be a sticky job, they're screwed into exhaust and can literally weld themselves in place. Plus in most cases you need special wrench/socket to get around the sensor. (they can be a real pain)

http://www.obd-codes.com/

WELL WHICH OXYGEN YOU REPLACING THE UPSTREAM OXYGEN SENSOR MOUNTED IN EXHAUST MANIFOLD AND THE DOWN STREAM OXYGEN SENSOR LOCATED IN THE EXHAUST SYSTEM AFTER THE CATALYTIC CONVERTER .YOU NEED A OXYGEN SENSOR SOCKET TO REMOVE IT.TO REMOVE OXYGEN SENSOR CRANK VECHICLE TO GET OXYGEN SENSOR HOT BECAUSE HARD TO REMOVE WHEN COLD.BECAREFUL DONT GET BURN ON EXHAUST MANIFOLD WHEN REMOVING OXYGEN SENSOR.AND WHEN INSTALLING NEW OXYGEN SENSOR USE ANTI SEIZE COMPOUND ON SENSOR THREADS.BUT MOST OF THE TIME NEW SENSOR WILL HAVE ANTI SEIZE COMPOUND ON IT.

Oxygen sensors are always numbered like this:
Bank 1 sensor 1
Bank 2 sensor 1
Bank 1 sensor 2
Bank 2 sensor 2

Some manufacturers use a kind of shorthand that reads different, but means the same thing:
Sensor 1/1 or O2s 1/1
Sensor 2/1 or O2s 2/1
Sensor 1/2 or O2s 1/2
Sensor 2/2 or O2s 2/2

Bank 1 is always the side of the engine where cylinder number 1 is located and, of coarse, Bank 2 is the opposite side.
On a 4 cylinder engine, there is only 1 bank and it is always referred to as Bank 1.

Sensor 1 is always the upstream sensor (The one located BEFORE the catalytic converter)
Sensor 2 is always the downstream sensor (the one that is located AFTER the catalytic converter.

Hope helps (remember to rate this).

Bank 1 is an O2 oxygen sensor located on the exhaust before the catalytic converter.

i had this problem last week and i changed my oxygen sensor under the engine not the one on the side see what number sensor does the diagnostic give no1 is side of engine and no.2 is under engine

two at the front on the exhaust cat and two on the rear, and yes if there tight

Here is a diagram for you to follow, please rate me
thanks

simon