Hi

I'm new here so please be kind ha
I've got a 2006 xj350 2.7D which started to randomly go into restricted performance a couple of time ages ago . not so long ago I drove through a fair amount of water not that deep but these jags don't seem to like water at all. Since then I have been getting the restricted performance all the time, I have replaced both MAF's and the air filter as this got wet . But I'm still getting the P0103 code . I've read a few threads on here but there never seems to be anything about how anyone was able to rectify their fault also looked in stickies but couldn't find anything relating to this but if someone can point me in the right direction of things to check / test and how to would be much appreciated not having much luck with mechanics surrounded by useless ones it seems .

If someone can help me would appreciate it extremely I've got two Jag's and can't drive either of them ....

 

if you can find the onboard diagnostic chart for the siemens pcm, go look for the p0103 rationality check

you might have an excessive airflow condition

 

Try a hard reset-it drains all the power completely

 

remove the battery leads and touch them together ?

 

Yes, that's it.

 

Tried a hard reset no joy . Car has a new battery also forgot to mention any other suggestions anyone ?

 

"I have replaced both MAF's and the air filter as this got wet"

Do you mean you have replaced the MAF twice ?

Have you done extensive searches on this forum and on google?

Something you could try while you are 'twidling your thumbs waiting for a lead
and is just a guess on my part:

Photograph the TPS showing it's position relative to the two screws holding it.
Remove screws and TPS
Unplug TPS and examine wiring plug and socket for wetness or faults
The TPS is basically two potentiometer tracks and contacts which move along
the tracks as the butterfly opens and closes.
Now on the bench you need to identify the correct pins to measure
the resistance of each track which should change smoothly as
as you turn the TPS.
If the resistances of both tracks are the same and change smoothly then
you can replace it in the same position as in your photo.
If you have any doubts you can open it to have a look at the tracks
but then you probably need a new one.
Hopefully Mark in NZ will correct my statements if required
Cheers

Bob

 

hi Bob

thanks .. The car has two mass air flow sensors so I’ve replaced both of them . I haven’t replaced the same one twice .

im not twiddling my thumbs I’ve been looking at the car to see if I can see anything obvious .

I’ve searched this forum and google but the threads to stop without a conclusion on the fault .

I’ve had two mechanics look at the car so far and it’s going in to another Thursday .

I’ll have a look and see where that is located on my car thanks 👍

 

Excuse my ignorance but I have never heard of a car with 2 MAF's
I assume that they are side by side and feed into a common TB ?
What is the point of two MAF's?
Do they read the same in terms of g/sec of air

jaguarforums.com/forum/xj-xj6-xj8-xjr-x350-x358-28/unsolvable-problem-p0100-p0103-117987/

 

MAF & MAP maybe???

 

The code points to problems with the wiring to the maf. Since you have changed them out you need to test the ground to make sure it is not high resistance and B+ feed to make sure it is not reading high - not more than 5V I would guess.

 

The 2.7 Diesel has two MAFs, the petrol engines only have one, and Jaggyola stated that his car is the Diesel.

Best regards,

Thomas

 

thanks for that I will check and see what I find