What is a Code P442

Asked by Jun 14, 2013 at 08:39 AM about the 2007 GMC Envoy SLT-1 4 Dr SUV 4WD

Question type: Maintenance & Repair

I have a 2007 GMC Envoy, today the check engine light came on, with a code reader I determined it was a Code P442 Evac Control System leak detected (small leak). What is this?

2 Answers

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The most commonissues are, Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back, or replace the gas cap, or Inspect the EVAP system for cuts/holes in tubes/hoses, aka vacuum lines.

Ok I got question I got 2003 gmc envoy check engine light came 442 code came up I think I fixed it then I took battery neg off put back on to have light go out. Now my car idle runs rough now a code comes up 0306 misfire cylinder 6 sparkplug what's def wrong

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