emissions scan test won't complete?????

[mtnman82]

I posted a while back about replacing the charcoal cannister to clear a check engine light. It's been 3~4 months, not quite 1000 miles and I plugged the scanner in and it still says it's waiting for the (evaporative) emissions test to complete.

Any suggestions to get this to complete? Maybe a hard reset - like disconnect the battery for 20 minutes?

Sorry, 2001 Expy, 4.7l, 4x2.

 

[JUST4FUN]

is the light still on? we need the code, if its a large leak the easyest thing to do is replace the gas cap

 

[mtnman82]

No codes. No stored codes, no pending codes. It has a 3-LED 'quick emissions check (red, yellow, green)'. It was red when I started, and it's been yellow ever since I cleared the codes. The scanner also was flashing both CAT & EVA, which the manual says means that test hasn't completed yet. The CAT stopped flashing within ~100 miles, but the EVA has been flashing every time I check it. I have an Innova scanner and it reads fine on my other cars. Maybe I'll replace the gas cap for the heck of it - thanks for the thought!

 

[nordictom]

Just a thought........ I had the same issue on a Dodge PU.
You may have a small leak in the EVAP System. If you get a smoke test on the system, it will show the leak asap. In the mean time, take a look at any rubber hose on the system, especially at a bend, they tend to crack on the inside.

NT

 

[jrjr]

Most likely the evap sensor. Not sure on Expys but quite often they are on the charcoal canister. Did you see one when you cleaned/replaced it?