I'm working through resolving these error codes on my 2003 XKR with 104417 miles.
Reading previous posts has been a great help.
I bought the ODBCOM diagnostic tool and it works w/o issues. This is not a self-contained device but consists of a hardware device that plugs into the OBD2 connector on your car and to your computer via USB.
I did a baseline and measured fuel trims and O2 voltages.
The plots below shows the short and long term fuel trims at idle and at 2500 rpms. (the levels are sampled sequentially rather than at once; for example; about 10 seconds of STTL bank 1 at idle, followed by 10 seconds of STTL bank 2 at idle, followed by 10 seconds of STTL bank 1 at 2500 rpm, then 10 seconds of STFT bank 2 at 2500 rpm. This was repeated for the Long Term Trim Levels.

Clearly there are problems as fuel short term trims are high at 2500 rpm and long term trims are high across the board. Just a bit confused why bank 2 short term trim greater than bank 1 short term at idle but bank 2 long term less than bank 1 long term at 2500 rpm.
Anybody have an explanation?

I was going to remeasure the trims after changing the air filter and then after cleaning the MAF. Before buttoning things up after changing the air filter I decided to look at the air intake pipe; big problem here:



No sense in making any measurements until this is replaced (about $210 at parts geek; any body have a cheaper source?). The curved portion at the bottom of the picture crumbled just from gentle handling. Any sense in wrapping heat resistant tape or exhaust wrap around this especially around the bellows as it sits above the exhaust manifold?

One other thing I noticed that there was that the voltage at the O2 bank 1 #1 was 0v, O2_bank 2 #1 was 0v, O2 bank 1 #2 was 0.8v, and O2 bank #2 was 0.22 (both voltage fluctuating and these are just one sample) .
Does the 0 volts at the front sensors make sense given the large air leaks in the air intake pipe or are there still bigger problems?

Thanking you in advance for your help.

 

Damn, seeing this is another reason to source an aftermarket metal induction pipe and get rid of all those unnecessary add-on ducts which have no perceivable function except eventually causing a leak path....!! Of course they are silencers and metal intake pipes are not always the best. Check out this thread....
https://www.jaguarforums.com/forum/x...-w-pics-58619/

 

Jaguar designed that intake that way for a reason. The idea is to dampen the compression waves/sounds coming from the supercharger blades and traveling up the intake track. Besides the undesirable noise, these waves tend to reduce the amount of air making it to the engine. These dead end tubes are resonators meant to capture these waves and make them bounce back in a manner that cancel them when most harmful. By default, I would use the Jaguar part as it is an active participant in producing the power/torque curves as designed.

Best of luck, keep us posted.

 

Meh. I went with the Mina Gallery aluminum intake pipe and used the stock air filter box and noticed no loss in performance.

 

I read the first post and was about to post "you have an air leak downstream from the MAF." But I guess you know that !
The upstream O2 sensors are saying 0 which is indicating lean as you have "pirate" air coming in, the downstream are saying cats not working as its too lean.
The air leak (unmetered air) has most affect at idle, at higher throttle =more metered air coming in so the air leak has much less of an affect.
Fix the holes any you should be good.