See attach photos this was on a Jag XKR 2001 54K miles

1/ Disconnect electrical connector and remove two phillips screws. Gently remove MAF sensor. (see pic 1)



2/ Spray CRC cleaner on the metal connectors below the bulb top until shiny clean 10-14 sprays should do it. Clean from both sides BUT DO NOT TOUCH ANY PART OF THE SENSOR!!! (see pic 4)



3/ From the top on one side you can see two other very small sensors inside the venture duct (see pic 5) spray 3-4 sprays on these to clean (DO NOT TOUCH THEM). Note most people do not know these exist I did'nt and did not clean and the MAFdid not work (performance restricted) once I clean these it worked fine.



4/ Clean the contacts (see pic 4)



5/ With compressed air blow out all the holes you can see as dust and crap builds up on the inside this should clean it. (se pic 5)



6/ Re-install MAF and reset then ECM i.e. disconnect the battery for 24 hrs. After connecting the battery reset windows (down hold 5secs up hold 5secs) and stereo settings.

I suspect step 3/ is not completed by most people so they end up buying a new one. I did but after taking a closer look and completing step 3/ my old one works also.

New ones can be bought for cheap from
Aliexpress.com : Buy Air Flow Sensor for (LNE1620BB=197408 0021) from Reliable Air Flow Sensor suppliers on HaoYang Auto Parts store

CRC spay I got on Amazon no Sales tax or S/H. (see pic 2)


Thanks
Simon

 

Thanks for taking the time to post up pictures and a follow through write up Simon.

I hope you don't mind I added the big pictures.

 

Simon,
To do a quick hard reset
Disconnect batt ground lead
Touch ground lead to batt +ve for a few secs
Reconnect ground lead in one clean move.
Saves waiting for the module capacitors to drain down.

 

Good post and very impressive cleanliness in the engine bay.

Graham

 

Nice post and one for the FAQ "how to's" perhaps?
Nice and clearly shown, thanks

 

The new ones also can buy from beltal.com which can pay with Paypal.

 

Could I just reset with my OBD reader?

 

That seems like an overly expensive way to clean it. I cleaned mine using q-tips cotton swabs and cotton ***** with nothing on them and a very tiny (hair trimmer cleaning) brush to remove the black gunk.

I inserted my MAFS back in place and secured it. I haven't gotten the restricted performance message nor a CEL ever since. Is the MAFS cleaner spray really necessary?

 

The MAF sensor spray cleaner may not be necessary, but it is certainly safer than risking damage to the sensor by touching/rubbing it. All three of our vehicles have MAF sensors that periodically need cleaning, a spray can of MAF sensor cleaner will last me for years, so it was a no-brainer to go ahead and purchase a can and just keep it on one of my garage shelves until needed....

 

Avoid using oiled filters and the cleaning requirement will be much reduced, and acurate reading of air flow will be enhanced.

 

I use q-tips with a little isopropyl alcohol on them (leaves no residue). Cheap & works perfectly, needs no force.

It's fine with a very steady hand & gentle touch but I wouldn't recommend it to anyone who's not totally sure they can do it.

 

Thanks for the excellent instructions! Saved me on repairs on my 2001 xkr. Symptoms left 18-22 and restricted performance bank 2 lean.
Regards Happy Jagged

 

Sorry not left but LTFT in %...

 

This is an old thread with not the greatest pictures but exactly what I needed to tackle the P0172 and P0175 restricting performance on my 2000 XKR. On inspection my new to me Jaguar had a dirty air filter and perhaps dirty MAF. I purchased a new air filter for $13 dollars and would've purchased a MAF from NAPA Auto Parts except they wanted $400 dollars for a refurbished unit! MAF sensor cleaner to the rescue and all codes are cleared and have not popped up again in a short interim drive. Hopefully won't pop up again in the near future.
Thank you to everyone that ever posted a "how to" thread. I expect to be very grateful!
Sincerely, Darcy

 

If it does come back, clean it again. It took me three tries at cleaning before the code really went away.

 

^^^^^^^^^^ +1

my experience as well. Even though I cleaned the sensor throughly each time, It took 3 times before proper
operation was achieved.

Z

 

Darcy - thanks for your positive feedback on an old thread. This is what makes the Forum an interesting place to visit.

I use exactly this procedure with the MAF Sensor spray - it's now part of my annual service - oil service, air filter change, MAF sensor clean, fuel filter change, plus I clean some of the easier to reach ground electrical body contacts, and clean and condition the leather interior. Every time I take the wheel liner off, I also lube the upper A arm fulcrum bolt. Don't want that long bolt binding again.

MAF spray is cheap, and as Jon89 said, I just keep it on the shelf (lasted 2 years so far) for both my Jag and L322 Range Rover).

 

I clean the MAF sensor every 20,000 miles or so. Still running the original factory Denso MAF sensor with no issues....

 

Also, double check the condition of the o-ring at the base of the sensor. It missing, it seems to create a bigger air leak than one imagines.

 

WOW I just learned about the hidden wires up inside the MAF after all this time, and a short spin already has avg mpg readout bumping up against 20 (US gallons). Who knew? I've been averaging like 13 mpg and wondering wtf? I think this might've done it. And yes, spray. It says in like 15 different places DO NOT TOUCH.