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Been digging into this more. About July 2020, CA bureau of auto repair started failing autos that did not have
a factory matching CVN AND CAL-ID.
Calibration Verification Number (CVN): a number set by OEMs to verify the integrity of the vehicle software
Calibration Identification (Cal-ID): an ID for the software installed on the Electronic Control Unit (ECU)
CVN is a checksum using the programming to create it. No one I can find knows how that checksum is calculated, yet.
Factory Ford tunes with a CARB number may still have a different CVN, but you would hope Ca. smog shops will have these in their list of
approved variances well before the time new broncos will need smog (5 years in jersey with new cars). Only reason I care about this at all,
is Jersey seems to want to follow Ca's lead on auto emissions and testing. Aftermarket tunes though, even with CARB numbers, may get you
a trip to the ref anyway if CVN is different.
A friend just went through emission check in jersey with a HPtuners tune, so Jersey is not immediately flagging the variances yet.
But I have read that some are appearing to get through smog in Ca., only to be sent a letter, sometimes months later to go to a ref.
Not sure if Jersey is doing that yet. Anyway. Unless you start changing things like injectors/mass air meters (even throttle bodies or
sometimes intakes) where you HAVE to run an aftermarket tune, you should be able to go back to stock tune for inspection
I'd guess larger turbos might be OK, but not sure if they might throw DTC's trying to get monitors ready with stock tune.
There is also codes called permanent DTC's, or P-DTC's. These are available to see only in scanners that read mode 10, permanent codes.
My $1100 Autel I got only 2 years ago does not do mode 10 (only up through mode 9). From what I understand, you can have a P-DTC, and
still have all the normal emission monitors ready. Ca. is letting you slide on P-DTC's (if they won't reset), if you have 15 starts, 200 miles and obviously
everything else Ok with emission system. I doubt anyone with only a tune is going to create any of these P-DTC's, but I suspect more modded
broncos may in the future.
Some interesting threads/vids I found along the way.
https://www.bar.ca.gov/ARSC/Newslet...l_ID_and_CVN_Detect_Programming_Modifications
https://forum.hptuners.com/showthre...-on-all-California-cars-now-regulatory-issues
https://www.gtrlife.com/forums/topic/316874-california-testing-for-oem-software/
a factory matching CVN AND CAL-ID.
Calibration Verification Number (CVN): a number set by OEMs to verify the integrity of the vehicle software
Calibration Identification (Cal-ID): an ID for the software installed on the Electronic Control Unit (ECU)
CVN is a checksum using the programming to create it. No one I can find knows how that checksum is calculated, yet.
Factory Ford tunes with a CARB number may still have a different CVN, but you would hope Ca. smog shops will have these in their list of
approved variances well before the time new broncos will need smog (5 years in jersey with new cars). Only reason I care about this at all,
is Jersey seems to want to follow Ca's lead on auto emissions and testing. Aftermarket tunes though, even with CARB numbers, may get you
a trip to the ref anyway if CVN is different.
A friend just went through emission check in jersey with a HPtuners tune, so Jersey is not immediately flagging the variances yet.
But I have read that some are appearing to get through smog in Ca., only to be sent a letter, sometimes months later to go to a ref.
Not sure if Jersey is doing that yet. Anyway. Unless you start changing things like injectors/mass air meters (even throttle bodies or
sometimes intakes) where you HAVE to run an aftermarket tune, you should be able to go back to stock tune for inspection
I'd guess larger turbos might be OK, but not sure if they might throw DTC's trying to get monitors ready with stock tune.
There is also codes called permanent DTC's, or P-DTC's. These are available to see only in scanners that read mode 10, permanent codes.
My $1100 Autel I got only 2 years ago does not do mode 10 (only up through mode 9). From what I understand, you can have a P-DTC, and
still have all the normal emission monitors ready. Ca. is letting you slide on P-DTC's (if they won't reset), if you have 15 starts, 200 miles and obviously
everything else Ok with emission system. I doubt anyone with only a tune is going to create any of these P-DTC's, but I suspect more modded
broncos may in the future.
Some interesting threads/vids I found along the way.
https://www.bar.ca.gov/ARSC/Newslet...l_ID_and_CVN_Detect_Programming_Modifications
https://forum.hptuners.com/showthre...-on-all-California-cars-now-regulatory-issues
https://www.gtrlife.com/forums/topic/316874-california-testing-for-oem-software/
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