Hey gang!

Quick question...after fixing my problem that induced my 'check engine' light, I disconnected the battery for a while, reconnected, reset the codes with my ODBII, and now I'm waiting for it NOT to read P1000 anymore so that I can get my emissions testing performed (required in the great state of Arizona).

While I'm driving the heck out of this cat at every opportunity to get it to go through its drive cycle, another check engine light came on with a goofy code that was a simple fix.

Here's my question: If I connect my ODBII to the cat and erase that code, will this also reset my drive cycle back to square-one?

I have over 2 weeks worth of driving so far and I would hate to have to start this all over again.

This drive cycle crap is killing me!

 

Various groups of codes have different drive cycle criteria. While there is a Ford drive cycle list posted I am not sure I have ever seen one for a Jaguar.

Not sure that answered your question.

 

Yes if you erase the code it'll clear all the OBD monitors and restart the drive cycle.

The drive cycle tends to be detailed in the codes PDF for your car/year. (Is for the S-Type, for sure.)

What you can do is clear codes, then watch to see which monitors haven't set after some ordinary driving and refer to the PDF then. Or post and ask for ideas.

Evap often needs fuel between this & that (say 15% & 85%) but also an overnight cool down.

 

Most of the codes reset in a few miles. Evap requires gas in the mid range (between a quarter and three quarters full tank )and you can't slosh the gas from when it is cold till when the monitor sets. This was a huge problem for me because I live on a hill. I left the car overnight at the airport, started flat, drove easy, and it reset before I got home.

 

Tom, there is Jag-specific drive cycle info in the attached, starting on pg. 4.
I think this came from JTIS, but memory is fuzzy.

 

How does one conduct a check to see what monitors have and haven't set at any given time? My OBD only tells me if there are any irregular codes, and that's it.

Do I need a more elaborate OBD reader?

If so, any recommendations?

 

I'm just using a cheap and cheerful Elm scanner and the free Obdwiz software but it shows which monitors are set.
If I was home I'd offer to zip down and check for you, but I won't be back for a few weeks.

 

All great information, and thanks to everyone!

I'm on the right track now.

 

Just confirming that even a cheap elm327 can report monitors that have/haven't set. You're working with arms tied behind your back if you can't tell each monitor status!

 

I understand that more now than ever!

I just assumed some normal driving around for 3-4 days would do the trick.

Man...I was WAAAY off!

Thanks for everyone's help.

 

On most of our cars, such driving will be enough. With a fault or a marginal code/no-code fault... sadly sometimes not.

EVAP can be awkward due to the need to have cold start, not too little or too much fuel and little or no sloshing. for example - gets tougher with newer cars as the laws were tightened and that left car makers with few options.