The FIXD wireless OBD2 scanner and free app for iPhone and Android translates your check engine light into plain English so you can rest easy. In this video, we explain what OBD2 code P0456 means and possible causes.
P0456 means a small leak in your evaporative system. This is often a super simple fix (hint: it's your gas cap), we do offer some more complex issue breakdowns.
The evaporative emission control (EVAP) system prevents fuel vapors from escaping into the atmosphere. The fuel vapors from the fuel tank are absorbed and stored by charcoal pellets in the charcoal canister. The vent control valve is controlled by the engine control module (ECM) and allows air to flow into the charcoal canister to purge the gas vapors into the engine air intake to be burned. The flow of the gas vapors from the charcoal canister to the engine air intake is controlled by a purge volume control valve. The vent control valve is usually open when the engine is at normal operating temperature, and the purge volume control valve is commanded on when the ECM is ready to burn the built-up fuel vapors.
However, when the vehicle is turned off the ECM performs a leak test to ensure the evaporative emission control system is working properly. During the leak test, the ECM closes the vent control valve and purge valve to seal the evaporative system. If the EVAP system does not maintain the pressure, the ECM recognizes an evaporative emission control leak. In the case of P0456, it is a small-sized leak, smaller than .020” in diameter.
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0:00 P0456 - Small EVAP Leak
0:05 P0456 is caused when there is a small leak in the EVAP System
0:16 What is the EVAP System?
2:00 Results of a P0456 code
2:15 Possible Causes of P0456
2:30 Visit our blog to learn more about P0456
2:40 Happy Driving!
#FIXD #P0456 #checkenginelight
9 июл 2024