p0442 code on 2004 Chevrolet Avalanche
March 7th, 2017, 3:02 PM
#2
CF Monarch
Possibly, it might be a vacuum line to, or from it. If the hose(s) are 13 years old, that'd cause it. I have about completely replaced all my vaccum lines on my 96.
March 7th, 2017, 8:37 PM
#3
p0442 is a small leak dtc. if the purge was not sealing, you could/would have a hard start after fueling. have the system smoke tested.
Did this code just set or is it an old code? most evap monitors don't run in the winter due to temperatures out of the monitor parameters.
Did this code just set or is it an old code? most evap monitors don't run in the winter due to temperatures out of the monitor parameters.
Last edited by tech2; March 7th, 2017 at 8:47 PM.