MIL BULB KOEO: Failed inspection 2002 Silverado 1500 LS 5.3T

[AP1500LS53T]

Failed annual inspection because "CHECK ENGINE BULB DOES NOT WORK".   I showed the tech that it does in fact work.  

 

The tech showed me his test, he:

1. put the key in

2. turn key to ACC - everything lit up, as expected

3. turned the truck on - CEL turned off, as expected

4. turn key to OFF - truck turns off, all lights as well

5. turn key to ACC - no CEL light

 

And this is why it failed inspection.

 

There are no codes in the computer, so there is no reason for CEL to be on or not work.  The bulb is fine too. It's just how it operates.

 

I tried a few scenarios myself and it appears you have to pull the key out for at least 10 seconds before putting it back in to see the normal behavior.  (CEL turning on, staying on and then going off when truck turns on.)

 

Their expectation is that no matter what, the CEL should always come on when you turn the key to ACC.

 

I'm wondering if this 10 second cool down is a known issue with these old computers.  You have to pull the key out long enough for it to shutdown or whatever it does before it can reinitialize.

 

Hope to hear some good insights.

[newdude]

?  They failed it because it didn't come on in the ACC position?  What state are you in?

 

Not sure what state you are in, but at least in NY, the ON and RUN position are what counts in NY state for state inspection.  Right column in the book is "Reject If" :

 

 

 

"Key On Engine Off".  In that position, the light should be ON ALL THE TIME until you start it.  Once you start it, it should shut off in 4-7 seconds.  

 

CEL light check isn't done in the ACC position.  

Edited November 15, 2021 by newdude

[Sharpz]

I would take it to another inspector.  Sounds like that dude just didnt want to give his inspection sticker to you.  

[dna9656]

It doesn't matter what the tech says he's used to, what does GM say about how it's supposed to work? It's supposed to work like the MFR says it's supposed to work.