Our '04 VDP has sometimes had the flaky fuel gauge issue, which when it first came up several years ago, my wife got a quote of over a $1000 to address it.

Instead, I'd always zero out the trip odometer whenever I'd fill up with gas so I'd have reference to whether the gauge was accurate or not, and this worked just fine for the last several years. However, the car died yesterday, and when I went to go rescue her, I noticed that the fuel filler door was ajar. Someone had syphoned/stolen 5 gallons of gas, and that's why the car died.

So, I decided I should tackle fixing the sender issue and I was reading the various TSBs and forum posts related to it.

TSB XJ310-03 lists the two sender part numbers as C2C31126 and C2C311125, but if you search a dealer or jag specialist, the part number for the sending unit is C2C24163.

Is the latter number an updated or improved unit that supercedes the TSB numbers? Anyone know the difference?

Thanks

 

Hi Mac

According to the Jaguar Electronic Parts Catalog (EPC) (which you can download from this forum for free and install on your computer), it appears that C2C31125 is the sender senser for the side of the tank with the sender ( The left-hand side? The diagram isn't clear). C2C31126 is the sender senser for the side of the tank where the fuel pump mounts (The right-hand side?).

The part number for the sender itself is listed as C2C20261.

To check for part number supersession, I go to jaguarmerriamparts.com, the Jaguar dealer in Merriam, Kansas, that sells OE Jaguar parts online. The two sender-sensor part numbers show up as current, but the website cannot verify that they fit an '04 XJ8.

The part number for the sender or "sending unit," C2C20261, has superseded to C2C24163, but again the website cannot verify that it will fit an '04 XJ8.

I've always had good success by calling Jaguar Merriam and giving them my VIN so the sales rep can confirm the correct part number for our car.

Cheers,

Don

 

I called two different dealer's parts department today, and I'm now more uncertain than I was before.

I'll try a couple more tomorrow to see if anyone actually knows something, or are just going by whatever the computer in front of them says.

 

The fuel sender is a little plastic housing which clips onto the side of the fuel

pump and problems with it are usually because of corrosion of the contacts.

Cleaning the contacts should restore it to work properly.

I have seen used senders for as little as 12 GBP.

 

Could be something simple like a contact problem.

Maybe some pictures of the sensor will help you decide what to do?











Don't forget you need the special tool to take the pumps out https://www.jaguarforums.com/forum/s...-pumps-130587/

 

So it sounds like it might be worth pulling them both out and cleaning the contacts before ordering the replacements per the TSB?

I put the Instrument Cluster into Test Mode, and with the tank full, I would initially get accurate readings from Raw1 and Raw2, but after a period of time they would both give open circuit readings of 255. On a long trip, the gauge will be showing empty with the yellow warning light, then randomly come back to life for a period of time. It seems to be more reliable when the tank has less than 10 gallons, but not accurate enough to rely on.

Are you gentlemen referring to only the dial like contacts from the float arm, or are there other contacts I should be looking at? Also, is there anything that can be put on the contacts to improve performance?

 

Yes only the contacts shown in Cambo's pics.

You could check operation after cleaning.

Disconnect battery before you do anything on fuel pumps!

 

But it's ok to smoke while I work on the open tank... right?


More seriously, is there anything we do on the X350 that the first instruction isn't "disconnect battery"?

 

I don't usually disconnect the battery before checking the tire inflation, but now you've got me worried....

 

UPDATE

My gosh, I'm shocked to see that I started this thread nearly a year ago, and I'm only now updating it.

With other members of our Jaguar fleet demanding attention, this little annoyance wasn't a top priority, but I am happy to report success on fixing it.

Many, many thanks to Cambo and meirion1 for saving me from throwing parts at the problem. Also thanks to Cambo for posting pictures of the seat latches on another thread, because without those I never would have figured out how to get the seat bottom up and out.

Pulled both senders several weeks ago, and used a white pencil eraser and spray carb cleaner to clean the contacts. Worked a treat! Wasn't certain how reliable the gauge reading would be so I went through several fill up cycles and would see how much gas/petrol the tank would take with the gauge at various levels.

This morning I calculated that it should take 17.0 U.S. gallons to fill the tank, and it took 17.015, so I'm ready to call it a win.

Thanks everyone for your help.