ok my car is in limp mode and the tranny and engine light is on i have a code 69 which i found out is the rotory switch on the tranny. i checked the tps,fuses and relay all checked ok car starts in park only isnt it suppose to start in neutral as well.i have spent alot of time on this and cant figure it out i even tried to move the rotory switch no go.i am getting ready to dump the car as much as i like it i bought it cheap. i am new to jags but not mechanics i have worked on mostly german car any help would be appreciated thanks in advance jon

 

Drive/Neutral input circuit fault.
Do you have Publication S-91???
Ask a moderator for access to the download.

bob gauff

 

I see that it is already in the FAQ section as 4.0 engine management guide

bob gauff

 

where do i look this up and thank you

 

XJ40
Sticky FAQ section at the top of the XJ40 (this) section
I uploaded it a few weeks ago!!

bob gauff

 

thanks

 

js:
There is also a good transmission warning light checklist in the XJ40 E-book posted in the same place. The good news is that this is not an uncommon problem and pretty well documented. With patience and working systematically, there is no reason why you couldn't get it sorted. Though, if you've fiddled too much with the rotary switch, you may end up needing to take to that to a Jag mechanic who will have the special tool required to re-index it. They really shouldn't be moved apart from opening them up for cleaning or inspection. Anecdotally, I understand that a dirty or flaky TPS is frequently the source of intermittent limp mode/tranny light.
If the car is otherwise in good shape, do not lose heart. It's probably a worth while journey to keep plugging away at it. Best of luck!
Scott