P1443 - Very Small Or No Purge Flow Condition

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P1443 - VERY SMALL OR NO PURGE FLOW CONDITION

Description:	A fuel tank pressure change greater than minus (-) 7 inches of water in 30 seconds occurred with a purge (fuel vapor) flow at less than 0.02 pounds per minute.
Possible Causes:	Blocked fuel vapor hose between the EVAP canister purge valve and the FTP sensor. Blocked fuel vapor hose between the EVAP canister purge valve and the engine intake manifold. Blocked vacuum hose between the EVAP canister purge valve solenoid and the engine intake manifold. EVAP canister purge valve stuck closed (mechanically).
Diagnostic Aids:	Check for blockages between the fuel tank, the EVAP canister purge valve, and the engine intake manifold. Check for obstructions in the EVAP canister purge valve diaphragm and ports.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	-	-	GO to HX: Evaporative Emission (EVAP) Monitor and System STEP 52