P1456 ACURA -EVAP System Leak Detected (Fuel Tank System)
Could be as simple as a loose or bad fuel cap.
EVAP code. po455 is an EVAP leak code for your vehicle's fuel emissions system. This is usually a fuel vapor leak or a lack of purge in the fuel vapor system. If you seem to be burning more fuel than usual you should get your car looked at soon. Could cause some problems down the road.
Trouble code P1456 means: EVAP Emission Control System Leak Detected (Fuel Tank System)
EVAP emission control system leak (large). Check to see if the fuel cap is missing or loose.
Most likely it means your gas cap is loose... or whats called an evap system leak.
Trouble code P1456 means: EVAP Emission Control System Leak Detected (Fuel Tank System)
P0442 - EVAP CONTROL SYSTEM LEAK DETECTED ( SMALL LEAK ) possible causes : - damaged , cross threaded or loosely installed fuel filler cap - aftermarket EVAP hardware such as a fuel cap not conforming to Ford specifications - small hole or cut in fuel vapor hoses / tubes - canister vent solenoid stays partially open on closed command - loose fuel vapor hose / tube connections to EVAP system components - EVAP system component seals leaking ( EVAP canister purge valve , fuel tank pressure sensor , canister vent solenoid , fuel vapor control valve tube assembly or fuel vapor vent valve assembly )
P0455 - EVAP CONTROL SYSTEM LEAK DETECTED ( NO PURGE FLOW OR LARGE LEAK ) possible causes : damaged or missing fuel filler cap / cap not installed correctly after-market EVAP hardware ( such as a fuel filler cap ) not conforming to Ford specs blockages or restrictions in fuel vapor hoses canister vent solenoid stuck open loose fuel vapor hose / tube connections to EVAP system components disconnected or cracked fuel EVAP canister tube , EVAP canister purge outlet tube , or EVAP return tube damaged EVAP canister mechanically inoperative FUEL TANK PRESSURE ( FTP ) SENSOR ( CHECK FOR VACUUM NOISE / FUEL ODOR IN ENGINE COMPARTMENT OR NEAR EVAP CANISTER + FUEL TANK )
EVAP small leak/no flow condition common when replacing fuel pump ( missed a connection) or simple as broken gas cap probable causes: defective or loose fuel cap EVAP canister or hose cracked-not connected purge or vent solenoid defective vacuum leak at engine
0442 evap emission control system malfunction(small leak detected) 0443 evap emission control system purge control valve circuit malfunction 0450 evap emission control system pressure sensor malfunction 0455 evap emission control system malfunction(gross leak detected) there ya go
Every once in a while it will fix your evap leak if you replace the fuel cap, but usually the leak is somewhere else. A good repair facillity will have a smoke machine that can be used to fill the system with smoke and locate the leak by seeing where the smoke comes out.