Question about 2000 Chevrolet Silverado
Check engine light on read out p0440. where do i start looking for leaks&is there something i can spray on the hoses to detect a leak?
Unfortunatelly not the only way to locate those leaks is with a smoke machine than aply smoke to the evaporative system but a loose fuel cap will give you this code or if you fill the tank with truck runing that also will set code after a few minutes of driving.
so make sure the fuel cap is tie and reset the code if code comes back then have it inspect for leaks
Posted on Jun 02, 2008
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Posted on Jan 02, 2017
Tips for a great answer:
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Remove and reinstall the gas cap, clear the code, and drive for a day and see if the codes come back.
Inspect the EVAP system for cuts/holes in tubes/hoses
Inspect for damaged or disconnected hoses around the Evap purge solenoid
Check and/or replace the sensor
Check and/or replace the purge valve
Have a professional use a smoke machine to detect leaks
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