I have a 1996 Jaguar XJS 6cyl. I can not pass the inspection, because the technicians get a constant “Monitor Not Ready”
I have been to a handful of mechanics (including the dealership!) and they do not know. Yes, I have had this issue for 3+ years now, posted on numerous jag forums, etc.
The monitors that are not ready include:
O2 Sensor -Not Ready
Catalyst-Not Ready
Secondary Heat Sensor- Not Ready
Evaporation System- Not Ready
I have done the drive cycle for the car (It is a very cumbersome procedure but I have done it multiple times, still no change). Also I have put over 35k on the car over a period of 3 years and the car still wont go ready on these codes. Each year I have to go through a month long process to get a waiver so I can renew my registration. I only need 2 of these codes to go ready (state of NC allows 2 not ready codes on 96-01 vehicles).
The car is old enough that you may need to clean the electrical contacts for these sensors. If you already did that, has the ECM been replaced? parts of it may not be functioning. Cleaning the contacts is cheaper. Start there.
In order to find out what lead ties to the memory you will need a wiring diagram. You could try doing a web search and may get lucky there. You could also try checking out forums for Jags that may have the info.