I have a 2003 Nissan with a code of P1456 canister was loose and gas cap was bad still showing that codeany suggestion


Asked by Jul 30, 2015 at 01:31 PM about the 2003 Nissan Sentra

Question type: Maintenance & Repair

evap system code p1456 small leak 0.020"  the canister was loose and replaced the gas cap any other places to look

1 Answer


Begin by clearing the code with a code reader or unplug the battery during the night. If it comes back, you may need to replace the evap switch. This is a known issue on these cars. The replacement part is more robust than the factory one. Be aware that the evap switch costs between 100$ and 200$.

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