06 GMC Yukon help needed

Ricky Wolfe Jr

New member
No the engine light is not on it failed for 2 not ready monitors
1 is evap other is 02 heater, which I feel should have readied itself pretty quickly but I have put 200 miles on this thing and cant get them to go, not sure if there was a secret to doing this that I was unaware of
 

flattop1

Dawg 89
whats the scan tool say?
o2 heaters are 12volt .
computers control them.
evap could be a bad sensor , open/torn hose .
no tricks I know of.
 

atwoodracing20

Dew Dawg
I have tried with some success to put a piece of cardboard in front of the radiator to bring up engine temp and getting monitors to run, just watch the engine temp
 
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