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P0455 Diagnostic Trouble Code Discussion for July 2006

EVAP System Large Leak

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Trouble Ticket Help Requests for DTC P0455
Help Request Posted
1999 Volvo V70 2.4L MIL Lamp on VIN: YV1LW55AOX
P0455: Large EVAP leak. Vehicle failed OBDII emission test. Both codes PO171 and PO455 present. Checked for vac. leaks first. Found usual broken vac. line under intake and repaired. Smoke test EVAP system. No leak found. Manually activated both the purge and vent valves. Both functio...
July 24, 2006
1997 Dodge Caravan 2.4L MIL Lamp on VIN: 2B4FP25B7V
P0455: EVAP System Large Leak Detected. good evening Van came in with evap codes, put van up in the air and it was obvious what was wrong. the two lines that go to the fill tube were rotted off. my question is do you have to replace the gas tank to replace these two lines? I called the dealer and h...
July 26, 2006
2001 Mazda Miata 1.8L MIL Lamp on VIN: JM1NB35381
P0455: EVAP System Large Leak Detected. ... on. The last time we cleared the code after replaceing the gas cap was 3 weeks ago. The code is the same P0455 large leak in the EVAP system. I checked the purge valve and the canister vent valve by manualy applying voltage to the valves both click and hol...
July 27, 2006