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p0456 was likely the gas cap, evaporative emission alert.
p1273
Either the exhaust is leaking or management needs reset.
'Clear the Self Learning Data' procedure. Anytime fuel component is replace, this procedure needs to be done. (exhaust emissions as well)
1. Unplug MAF sensor
2. Start car for about 3 seconds. Turn off car. confirm P0102 code
3. re-connect MAF sensor. Clear code. START car.
4. Run car for 10 mins.
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
wen ever i go through puddles in my neon the engin light will go on i have to take the ground off of the battery n sumtimes that wont even work if its been on for over 100 miles n u try alot check the computer
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