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P0456 DODGE - EVAP System Small Leak As you see form the list there is not a single problem that causes this code to set. Possible causes- Missing or loose fuel cap - Incorrect fuel filler cap used - Fuel filler cap remains open or fails to close - Foreign matter caught in fuel filler cap - EVAP canister or fuel tank leaks - EVAP system hose leaking - Fuel tank leaking
p0456--emission control system leak(verysmall) leak, check all hoses to emission controls, cylinder 3 missfire detected. could be plugs, wires, or coil.this is code p0303,
this is an emission leak code..could have cracked emission hose at back of engine or on top of fuel tank..check gas cap for corrosion or filler tube for holes
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