"check engine" light

[OtterbatHellcat]

Alright, I'm not gonna argue with anyone about what I do for a living every day.

Stag, good luck, brother...I hope it ends up being a simple fix.

I appreciate everyone trying to help a brother out.

[Irving]

Did they just recently change the emission law that you CAN have a check engine light, or that you can not? I remember it used to be that as long as you passed, it didn't matter if a light was on or not.

[tmleadr03]

Did they just recently change the emission law that you CAN have a check engine light, or that you can not? I remember it used to be that as long as you passed, it didn't matter if a light was on or not.

I have had customers make it through with a check engine light, but not with a check engine and a ABS warning light. Have to have the ABS light off before it gets on the dyno.

[JMBD2112]

In most vehicles It's actually a rollover valve to help prevent fuel spillage in an accident. It shouldn't cause an evap code because it doesn't seal anything, the gas cap does. Kinda hard to diagnose a vehicle from the computer. If you're ever down in my neck of the woods anytime soon you can use my scanner

[sniper7]

I just want to know why you were trying to steal your own gas?

[StagLefty]

I just want to know why you were trying to steal your own gas?

Read first post.

[sniper7]

Read first post.

I know I was just kidding

I'll just:

[Skully]

I just want to know why you were trying to steal your own gas?

It is a new thing all the cool kids are doing these days.

Read first post.

I hope you not in some way blaming me for your "Check engine light" I didn't ask you to stick your hose thingy down the filler.

Serious note I have this feeling it is a coincidence. If you look at the filler / line down to the tank if you see wires to a sensor then maybe but I have never seen a sensor in that area. Newer cars do tell you if you need to replace your gas cap. Wife's 2008 Commander (the one I was trying to transfer the gas out) did it to us, it has a dedicated idiot light that lite up and said "check engine gas cap." sure as shit simple fix. I believe the fuel system is closed loop and somewhere there is a sensor that tells the computer it has a pressure leak and figures it is the gas cap. Not sure how it knows it is that or a leak with the carbon canister or lines.

How far have you gotten to figure it out?

[tmleadr03]

It is a new thing all the cool kids are doing these days.

It pressurizes the system and measures the drop of pressure. A large amount o pressure drop means it is most likely the gas cap since otherwise it would be a small hole elsewhere in the system. So a slower pressure drop. More of an educated guess then a "known" variable.

I hope you not in some way blaming me for your "Check engine light" I didn't ask you to stick your hose thingy down the filler.

Serious note I have this feeling it is a coincidence. If you look at the filler / line down to the tank if you see wires to a sensor then maybe but I have never seen a sensor in that area. Newer cars do tell you if you need to replace your gas cap. Wife's 2008 Commander (the one I was trying to transfer the gas out) did it to us, it has a dedicated idiot light that lite up and said "check engine gas cap." sure as shit simple fix. I believe the fuel system is closed loop and somewhere there is a sensor that tells the computer it has a pressure leak and figures it is the gas cap. Not sure how it knows it is that or a leak with the carbon canister or lines.

How far have you gotten to figure it out?

Formatting error being blamed on posting from cell phone.

[StagLefty]

Getting with Bogie today hopefully. He has one of those scanner thingies.
Skully on advice of my lawyer I can't discuss this with you