P1647 on a 2005 jaguar x tpye,change o2 sensors on both banks ,still have same problem

Don't think the sensors were the problem

You never change the rear monitors anyway

You use the code & reference material, to diagnose
what the code tells you,doubt that was done

Look at fuel trim on that bank, it should be rich

Check & clean MAF Sensor & all intake ducting for vacuum leaks
Smoke test intake & manifold, as well as exhaust before cat if you need to

If fuel pressure is good & only one bank is rich scope O2 Sensor
to confirm then scope the injectors on that bank & you will se if they stick

May have to remove all injectors & mail away for ultra sonic cleaning

This happened to me and the problem was the other O2 sensor, Jaguar pointed me in the wrong direction, simple to check if you still have the old sensor fit it to Bank 1.

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).

Yes it can be determined by the DTC (Data Trouble code). If the DTC is P0420 (catalyst system efficiency below threshold Bank-1) then the side of the engine with the #1 spark plug and cylinder is always Bank-1, and the O2 sensor that monitors the catalyst efficiency is usually after or (post) of the catalytic converter.

The #1 cylinder is located at the front spark plug on the right or the passenger side of the vehicle, so Bank-1 is on the right side of the vehicle, and the O2 sensor that monitors the catalyst efficiency should be located after or (post) of the catalytic converter. It would be the post right O2 sensor.

There is also the possibility that the catalytic converter is actually starting to fail, and if changing the O2 sensor and clearing the DTC does not solve the problem them the catalytic converter is most likely faulty.

P1193 is the heated O2 sensor, P0300 is a random missfire, P1313 P1314 are Catalist damage banks A and B, the rest of the 'P' codes are all to do with the same area, have you changed one at a time? or both at once? as the conectors can be crossed and this will throw the ECU out, generating the fault codes given.
You will need a Jag garage to re set the sensors.

P0174 is System Too Lean Bank 'B'. This will almost certainly be an air leak somewhere in Bank B from where the inlet manifold splits into 2 to feed Bank 'A' and 'B', or possibly a leak in the exhaust manifold / catalyst or where the O2 sensors are fitted into the exhaust. Cleaning the MAF is unlikely to make a difference, as if this is the problem you'll either get a lean code for both banks (P0171 and P0174) or a MAF sensor code (P0101). If the O2 sensor is a fault you'll get an O2 sensor code for Bank B, so don't chance an expensive change of this!
A blocked fuel filter won't only give this code (again it'll affect both banks), ditto the air filter.

As regards to only showing up on highway driving, the leak may only be small and only evident at a higher under bonnet temperature.

P1647 Linear O2 Sensor Control Chip (Bank 2)
P1646 Linear O2 Sensor Control Chip (Bank 1)
U have a lean engine air/fuel mixture for unknown reasons, check for vacuum leaks.

change O2 sensor their cheap enough ,heater valve not sure about ,seat and mirrors is either a fuse or a relay