P0456 OBD-II Code: Evaporative Emissions System Small Leak Detected [1]
Evaporative Emissions System Small Leak Detected P0456 is an generic powertrain code, applying only to OBD-II vehicles, that the Powertrain Control Module (PCM) has detected a lack of pressure at the Fuel Tank Pressure (FTP) sensor within the EVAP system indicating a small leak.
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