My Maxima has been throwing code P0456 at me for the last month when the Service Engine Soon light came one. Did some searching online and it brought my attention to a failing fuel cap. I bought a new OEM Nissan one for about $20 and then reset the check engine light and it later came back with the same code. Next I replaced the EVAP canister vent control valve. It's been off for a while now. Once again cheap sensors. I've never heard of this part ever going bad in any car.
My Maxima has been throwing code P0456 at me for the last month when the Service Engine Soon light came one. Did some searching online and it brought my attention to a failing fuel cap. I bought a new OEM Nissan one for about $20 and then reset the check engine light and it later came back with the same code. Next I replaced the EVAP canister vent control valve. It's been off for a while now. Once again cheap sensors. I've never heard of this part ever going bad in any car.
- Adrian R., South Jersey, NJ, US