Anyone experience a p1421 code after UPREV tune

Da370z · 09-16-2019, 08:44 AM

Basically title is my question, also related to the code it says its cold start idle control? the Z once in awhile idles high for a couple seconds then goes to normal at start up im assuming the code is causing the idle issues I tried searching and couldn't find an answer or solution on this, just wondering if anyone else has had this come up and if they have found a solution, thanks!

Z_ealot · 10-26-2019, 11:04 PM

I just had this same issue and my tuner had to disable simple timing in uprev in order for my Z to run correctly, I’m not sure what it is but my early production Z doesn’t seem to like any of the newer features of uprev

Z_ealot · 12-28-2019, 08:14 PM

I worked with uprev to correct the issue, as long as you have the very latest ROM the issue should be resolved now

09-16-2019, 08:44 AM	#1 (permalink)
Da370z Base Member Join Date: Sep 2014 Location: New Hampshire Posts: 73 Drives: 09 370z at Rep Power: 11	Anyone experience a p1421 code after UPREV tune Basically title is my question, also related to the code it says its cold start idle control? the Z once in awhile idles high for a couple seconds then goes to normal at start up im assuming the code is causing the idle issues I tried searching and couldn't find an answer or solution on this, just wondering if anyone else has had this come up and if they have found a solution, thanks! Last edited by Da370z; 09-16-2019 at 09:26 AM. Reason: explaining code

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10-26-2019, 11:04 PM	#2 (permalink)
Z_ealot A True Z Fanatic Join Date: Sep 2010 Location: Albuquerque, NM Posts: 2,045 Drives: 09 370Z Touring/Sprt Rep Power: 10091	I just had this same issue and my tuner had to disable simple timing in uprev in order for my Z to run correctly, I’m not sure what it is but my early production Z doesn’t seem to like any of the newer features of uprev

12-28-2019, 08:14 PM	#3 (permalink)
Z_ealot A True Z Fanatic Join Date: Sep 2010 Location: Albuquerque, NM Posts: 2,045 Drives: 09 370Z Touring/Sprt Rep Power: 10091	I worked with uprev to correct the issue, as long as you have the very latest ROM the issue should be resolved now