p0442
#2
03-27-2008, 03:39 PM
RE: p0442
http://www.obd-codes.com/p0442
My truck is throwing the code from time to time and I know it to be because of aissues I had with the fuel system that cause the filter canister to become saturated with gasoline. One of these days I'm going to clean out the canister and install new charcoal and filters.
This indicates a fuel vapor leak in the EVAP control system. It means a very small leak has been detected. In fact, the leak can be from a hole as small as 0.04" in diameter. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.