I got the below requirements from an old post, I am not sure if they are accurate. My question is that it notes that you may have to complete the cycle 5 times. Does this imply that each step has to be done 5 times in any order or do you need to complete one full set of 8 steps before you can move on doing it all over again. I am suspect on this set of directions since the cold start must be wrong, no way do you need a cold start below freezing or folks in Florida would never pass.

Drive Cycle (OBD-11)
A “drive cycle” carries out EPA diagnostics on all systems.
The drive cycle can be completed in approximately 15 – 20 minutes and is performed in the following 8 stages:
1. Cold Start
To qualify as a “cold start” the engine coolant temperature must be below 0°C and within 6°C of ambient air temperature. Don’t leave the ignition key on prior to the cold start or the heated oxygen sensor diagnostic test may not run.
2. Idle
The engine must be run for two and a half minutes with the air conditioner and heated rear screen ON. The heavier electrical load the better as this will test the O2 Heater, Passive Air, Purge "No Flow", Misfire and (if closed loop is achieved) Fuel Trim.
3. Accelerate
Turn off the AC and all the other loads and apply half throttle until 55mph is reached. During this time the Misfire, Fuel Trim, and Purge Flow diagnostics will be performed.
4. Maintain Steady Speed
Maintain a steady speed of 55mph for 3 minutes. During this time the O2 response, EGR, Purge, Misfire, and Fuel Trim diagnostics will be performed.
5. Decelerate
Lift off the accelerator pedal. Do not shift gear selector or touch the brakes. It’s important to let the vehicle coast, gradually slowing down to 20 mph. During this time the EGR, Purge and Fuel Trim diagnostics will be performed.
6. Accelerate
Accelerate at 3/4 throttle to 55-60mph. This will perform the same diagnostics as in stage 3 above.
7. Maintain Steady Speed
Maintain a steady speed of 55mph for five minutes. During this time, in addition to the diagnostics performed in stage 4, the catalyst monitor diagnostics will be performed.
8. Decelerate
This performs the same diagnostics as in stage 5. Again, don't shift the gear selector or touch the brakes.
If the catalyst is marginal or the battery has been disconnected, it can take 5 complete driving cycles to determine the state of the catalyst.

 

Not 5 times, pretty sure about that, although it might need some "up and down" for some of the parameters.

My 1998 XJ8 has the same engine as yours, and was a US spec.
I disconnect the battery if I am not sure I will drive her without a week, so I basically start with a re-set OBD2 (P1000) most of times.

Mine always sets within some 20 miles / 20 minutes, with a ride consisting of some city stop and go, then secondary road (more go than stop), then what you can call highway (50-70mph).
It will set most within the first 10 minutes, then the last 2 ones (catalyst always the last) within a couple of miles on the highway.
I run live Torque Pro, so I can see /hear the consequent setting, and the final P1111.

BTW, I live on a tropical island, and the temperature in the parking never goes lower than 20C, so no cold start conditions indeed, never.

 

If you took that from the attachment in one of my posts in that linked old thread from 2012, it's a typo for 30°C.

Graham

 

"If you took that from the attachment in one of my posts in that linked old thread from 2012, it's a typo for 30°C.

Graham"

That makes sense. Do you know if the order that things are done matter. For example if I do 5 accelerations (i know i have to restart the car each time) prior to getting all the cold starts in, will all 5 accelerations count.

I am having a hard time getting the p1111 readiness to set up.

 

I never did any drive cycles on my cars or the ones I worked on and they all but one cleared within a couple of days. The exception was a 2000 XKR that took three weeks. I was about to send the instructions to the owner when it finally made it to P1111.

 

I may have something else going on. But I just reset it again since I did an ABS module fix, but even before that I can't get that code back. Driving me nuts. I am going to do some massive driving this week and see if I can get it. I will follow the cycle listed above.

 

Have you looked for codes with a jag specific reader to see if there is a problem that can't be detected with a generic reader? I know emission related problems should be displayed with a generic reader, but it shouldn't be this difficult.

 

That should be the exact next step, in stead of driving for a week.
An ELM237 and Torque Pro installed on an Android device will tell you exact what is happening for less than 20 dollars.
If there is something else wrong, it will never set, and you will get to the cause at some point ...

 

Scott,

I posted that original Drive Cycle PDF in 2013. I've found a later and more detailed DIAGNOSTIC MONITORING - DRIVE CYCLES document in my XK8 maintenance history and attach it here as a PDF.

My notes also record that it isn't necessary to complete the entire series - individual monitoring cycles can be completed as required.

Graham

 

I have Torque Pro but did not know about this report, I will have to look for it in the application. thanks!

 

It is in the earlier menu where you select the type of gauge you want to see (line, digital, needle, etc).
Scroll down and you will see some general multi gauges which can be selected.
One of them is the one shown above.

 

its very frustrating for this to happen. I had to drive about for 3 months , registered later than i wanted to and got a penalty, then it finally cleared in another YEAR! I tried all sorts of stuff, driving, etc...it just clears when it feels like it!

 

Don't know if Scott's drive cycle worked perfectly or if it was just that I had to drive 50 miles outside of town to find a highway where I could do 55mph for 5 minutes straight without being interrupted by traffic and then coast down to 20mph without being rear-ended. But wanted to say thanks. System reset P1111, stopped by the inspection station and passed on the way back home.

 

1999 Jaguar XK8 coupe
I had the same issue with my Missouri Emissions test, required in four Missouri counties: three out of five required monitors had not reset. I drive my 1999 XK8 coupe less than 1,000 miles each year that I have owned her and was told I would likely need to drive her 200 or so miles to get the monitors to reset. The inspection station told me to drive her for a week then come back for a retest. But, I found that Missouri allows an exemption from emissions testing for car driven less than a total of 12,000 miles between biennial emission test, verifiable by the odometer readings recorded on the respective safety test documents. (See https://dnr.mo.gov/forms/780-1972-f.pdf )
I now have my license plate "XK8-1" renewed for two years.
Check to see if your state allows exemptions and if you qualify.