Join Date: Apr 2010
Location: Hiding from those who might be looking for me
I dont own Hyundai car, I drive everybody else Hyundai during day
Mentioned: 262 Post(s)
Quoted: 2485 Post(s)
0455 is the system essentially remain atmospere when self test occurs...
PCM closes CCV,, then starts to duty cycle purge to dray system into vacuum and watch tank pressure sensor change and abillity to hold vacuum for so long...
Tank pressure value during self test with 0455 see no movement what so ever, tank pressure value remain atmosphere,, hence the LARGE EVAP LEAK code..
Possible CCV not close,, inspect wiring closely for CCV underneath..
As a DIY,, you at major disadvantage,, I have GDS to do self test,, and can do various manual task and do test to see if my task remedy,, then make repair
Purge generally leave a 0456 in some instance,, or 0441 incorrect flow.. you might look at purge and see if valve does indeed draw vacuum when PCM command, though you will have to wiat for valve to cycle and catch it via body side of valve with hose removed
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