Possible causes
– Failed or missing gas cap
– Failed Fuel Tank Pressure (FTP) sensor
– Line/system blocked or kinked
– Failed Fuel Tank Pressure (FTP) sensor
– Line/system blocked or kinked
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1455 FORD Description
Evaporative Emission Control (EVAP) monitor enabled and Engine Control Module (ECM) detected a gross leak in the EVAP system