NY State Inspection with permanent code resolution

[Tedybear315]

I may have asked this prior- So forgive if this is a repeat.

Going to dive back into our 2011 Silverado with the 5.3 that's had the VVT engine swapped for an early engine without VVT.

There is no way to flash the vin into an older PCM that doesn't have VVT (we asked, answer was no due to GM's service code)

Currently we've got the VVT code and a Cam performance code. The cam code we're fairly sure we've figured out the issue.

If we use HP Tuners system to 'delete' the VVT or detune it- I have been told it will turn the CEL light off-but still have the VVT code in permanent memory so it won't pass a state emissions inspection.

NYS is pretty cryptic and doesn't list much about "If you drive 'x' miles with 'x' start ups on a permanent code..it's ignored". Google AI search flat out states it'll fail regardless.

So before I shell out a few hundred bucks on the repair for the Cam sensor. If it won't pass NYS inspection due to the VVT code being permanent it would be a waste of money and time... Just need to know if anyone's had success in NY trying to accomplish this. Everything else on the engine is fully compliant as it should be. Just need to know if 'detuning' that VVT code can allow it to pass the inspection as it will likely still have that permanent code floating around.

Thanks!

Steve B-

[2xLS1]

You need to find out if NY is looking at CVNs during inspections or just readiness tests and codes. If they are checking CVNs then nothing except a stock calibration will pass.

[Tom @ Overdrive]

The "Permanent" code for VVT will be fine. Fix the cam sensor or potential timing issue.

[edcmat-l1]

You need to find out if NY is looking at CVNs during inspections or just readiness tests and codes. If they are checking CVNs then nothing except a stock calibration will pass.

This is first thing. Understanding exactly what they're looking for. You can't be vague.

Normally if they're only looking for codes/monitors they'll let up to 2 permanent codes but nothing pending or current and also all monitors have to be completed.

The "VVT code" although you're being vague is most likely the circuit code or the failure of the comprehensive component monitor. Solution to that is connect the OEM VVT components even if it requires extensions, adapters, etc., and run around until the permanent code goes away. It may happen almost immediately after key on with all the components connected.

PITA yeah but can be done.

[Tedybear315]

This is first thing. Understanding exactly what they're looking for. You can't be vague.

Normally if they're only looking for codes/monitors they'll let up to 2 permanent codes but nothing pending or current and also all monitors have to be completed.

The "VVT code" although you're being vague is most likely the circuit code or the failure of the comprehensive component monitor. Solution to that is connect the OEM VVT components even if it requires extensions, adapters, etc., and run around until the permanent code goes away. It may happen almost immediately after key on with all the components connected.

PITA yeah but can be done.

Code it's producing is for open circuit for the VVT solenoid. (which it doesn't have) It's also got one for cam performance and it needs to have the relearn done. The cam code we know what the cause of it is... Something with the reluctor on the timing cam gear is making slight contact with the sensor. It might be that timing gear is slightly warped. The scope readout was about 75% what I would expect, but it drops the signal rhythmically. Did the same thing with the installed sensor, and two replacements (Walker 'oem'.. and a factory GM sensor)

I used an inspection camera and did a full 360' of the cam gear. The GM part # stamped showed exactly which one was used. (non-VVT) I've got that part # written down somewhere, but it was for the normal cam gear with the raised sections for the sensor. Short of cobbling a dial indicator to see if somethings bent/warped... It'll need to be pulled apart regardless.

Now when I did rewire the cam sensor and obtained the original harness and pig tails- The cam sensor fit like a glove- I left the 2 wires for the VVT solenoid zip tied to the upper harness where I could reach it. The plan was to snag the solenoid off a junker out of the scrap yard. Wire it up and see if it would shut the open circuit code up. (It would still trip a VVT code for performance I imagine...There's nothing for it to 'phase')


If I can get the cam sensor issue resolved and have the PCM not have a hissy fit with the NYS computer for the inspection- It makes sense to invest in getting that cam issue resolved-disabling the VVT in the system, etc.. But I'd rather not spend over $400 for the tool and the VIN use..as well the timing set...my own labor..

If I'm not 100% sure it'll not trip the states computer, I'll not go forward.

That would be a huge shame, as the rest of the truck is in very good shape, and that engine runs fantastic.

[2xLS1]

There is a reason people call your state the Peoples Republic of NY. And you never said if they are checking CVNs. There is a YouTube channel called South Main Auto Channel and the shop owner there is always saying how difficult it is dealing with NY inspections.

[Tedybear315]

There is a reason people call your state the Peoples Republic of NY. And you never said if they are checking CVNs. There is a YouTube channel called South Main Auto Channel and the shop owner there is always saying how difficult it is dealing with NY inspections.

The term "CVN" is not one I'm familiar with.

I do know they plug in the OBD II for the states inspection computer. It reads the ready monitor, CEL status..and if Google is to be believed, if the PCM has a perm. code it will flunk. Now CA (which NYS usually follows like a sick puppy....) has a provision that if the PCM has a perm. code and it doesn't kick to 'active/current' it accepts it after something like 200 miles of drive time and about 15-20 start/stops of the ignition.

I know Eric O's channel quite well. He's in Avoca, NY and I used to live in Bath, NY about 10 miles from his shop. Talked with him and Mrs O about a repair on an explorer a few years ago. He was highly knowledgeable and that's where a lot of people picked up the phrase "PRNY" (He's also the reason we fluid flim our cars..and never use rubberized aftermarket undercoating)

Yeah, our inspections stink. Even that "Spend $450 to try to resolve and we'll issue a waiver for the year" never happens, as the state flags any shop that does that even once for 'audits and inspections'. Not worth it to get anal probed by the state...they won't even buy you dinner first... no shop in my area would be willing to work on it under those conditions.

[2xLS1]

According to Eric O your 2011 Silverado's frame should look like swiss cheese by now anyway driving it in the PRNY.

[2xLS1]

In the context of vehicle emissions and diagnostics, CVN stands for Calibration Verification Number. It's a unique code generated by a vehicle's computer to verify the integrity of its software, particularly in emission-critical control units. When a vehicle's software is modified, the CVN changes, which can lead to a failed emissions test in states like California.

[Tedybear315]

In the context of vehicle emissions and diagnostics, CVN stands for Calibration Verification Number. It's a unique code generated by a vehicle's computer to verify the integrity of its software, particularly in emission-critical control units. When a vehicle's software is modified, the CVN changes, which can lead to a failed emissions test in states like California.

Ahh, okay. That makes sense. Really unsure of what to do to get this resolved. Probably only the state knows the answer to that question- And highly likely they won't know if asked. (welcome to NYS bureaucracy)

Yeah Eric O has a lot of history with NYS Rot-Boxes. When you find one that's not swiss'd up? Break out the fluid film each fall and that will help the undercarriage from turning into mush.