Question about 1999 Mazda MX-5 Miata
Code PO455 came on with check engine light, local auto parts place said that it is the fuel cap it probably was not closed correctly. Tank is 1/8 full, meaning the gas cap was opened five days ago. What else can it be? Is it something I can trace and replace or repair myself? I am a driveway mechanic, no formal training. Did better in earlier cars with no computerized stuff.
PO455 Evap System Gross Leak
The old days left in 1981 some 32 years ago
You really have to smoke test the Evap System to
find hose leaks & use a scan tool to actuate the solenoids
to check for bad ones
Without a system diagram your pretty much lost
Posted on Nov 27, 2012
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Posted on Jan 02, 2017
SOURCE: check engine light came on
CODE PO455 IS EVAP SYSTEM LARGE LEAK 0.080 DETECTED. POSSIBLE CAUSES FUEL FILLER CAP LOOSE CROSS THREADED OR INCORRECT PART. PURGE SOLENOID VALVE IS DAMAGED OR HAS FAILED. CHARCOAL CANISTER IS LOADED WITH FUEL OR MOISTURE OR HAS FAILED. CANISTER DRAIN CUT VALVE CDCV IS DAMAGED OR LEAKING. FUEL TANK PRESSURE FTP SENSOR IS DAMAGED OR HAS FAILED. CATCH TANK OR ROLLOVER VALVE IS DAMAGED OR FUEL TANK IS LEAKING.VAPOR LINES DAMAGED OR LEAKING BETWEEN THE PURGE SOLENOID AND INTAKE MANIFOLD , PURGE SOLENOID AND CANISTER OR BETWEEN THE PRESSURE CONTROL VALVE, CHECK VALVE AND ROLLOVER VALVE. PCM HAS FAILED.
Posted on May 06, 2011
SOURCE: 2004 Mazda RX-8 PO455
It will not go off by itself,you will need to reset it by connecting to a diagnostic tool.Once cleared if there is any other problem then it will trigger the check engine light again.Hope this helps..
Posted on Sep 03, 2009
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