P0121 code today, Looking to swap out the TPS for my '99 XK8. Part is a Denso 198500-3250.

I know JAguar won't sell them separately from the throttle body., Anyone know of a cross reference Denso that will work. If not, anyone know of a trustworthy source of used one? I see a lot on eBay. Some claim they are new, but I'm dubious they are nothing more than cheap knockoffs.

Thanks for any help you can provide.

BTW: a local Jaguar salvage yard suggested unplugging the TPS and cleaning the contacts. Gave it a quick look, but can't figure out how to unplug the wiring harness. Hate to compound the issue by doing something stupid.

 

the genuine supplies are exhausted. almost all of the new denso branded ones were counterfeit in the first place.

just use the cheap ones

 

I purchased two "new" units from eBay that came without a part number and were absolutely worthless but i did get my money back. I found a used unit with about 50,000 miles on it and it has worked flawlessly for two years and cost under $60.00. There are now complete throttle bodies available for around $500.00 which is half of the dealer price.

 

I'm assuming the complete throttle bodies are refurbished, correct? The cheapest I've seen for a brand new throttle body is north of $2,000.

 

Did you follow the link I gave in your earlier thread on this same topic?
https://www.jaguarforums.com/forum/x...acement-77560/

It has a detailed series of posts on testing the TPS and determining reasons for failure.



Insert a small flat blade screwdriver into the gap:




Press down GENTLY to release the locking tab and pull the connection apart:





Looking inside the plug, you are trying to release the 'tongue' below the yellow block from the 'keeper' (arrowed in red) on the TPS.

The other connector separates in a similar manner.

Graham