Close
QUESTIONS

RepairPal is your advocate for car care advice and guidance

Q: EVAP system on 2001 Chevrolet Blazer

I have a P0440 code.Evap System no flow during purge.
Get a Repair Estimate
Guaranteed by certified locations nationwide. Learn more
RepairPal estimates are guaranteed at over 1,700 quality certified locations nationwide. Learn more
Ashby3,

Basically, this code indicates a large leak or large restriction that is preventing the EVAP system from developing / holding vacuum.

Test to ensure your gas cap is secure. Other than that, a further diagnostic test must be performed using proper test equipment, including a smoke vapor machine. Anything other than that will be guess work.

Good luck,
-Dave
Didn't find what you were looking for?