Car: 2001 XKR built July of 2000
I have code P1111 showing after many repairs and car runs great. I understand that P1111 indicates that all diagnostic checks have been completed. Is it OK to delete that code now that car seems OK? Or should I leave that code in?
Thanks to all for your previous help. See my posts under "Poet" for how I fixed P0171, P0174, and others.

 

I deleted mine after some code issues. I seem to recall it could come back till car has run through several cycles and clears it on its own!?!!?!?!?

 

P1111 indicates all tests are complete and everything is working within parameters. No need to delete it, it is the code you always want to see.

 

Do NOT delete the P1111 if you have state or provincial emission testing as this will cause an automatic fail. It is required to prove that all the system monitors have completed their tests and are monitoring the anti pollutions devices.

 

+1 Mikey, not living in a monitoring state anymore I forgot about that little ditty.

 

Thanks ya'll. I forgot about the emissions angle. Will leave it in.

 

If you clear code P1111 you will only replace it with P1000 until the monitoring test are completed again. One of these codes will always be present. They are a status and not an error.

Graham

 

You want P1111. Clearing it will get you an unwanted P1000. (Jag docs / this site tell you why.)