Caution: Refer to Gasoline/Gasoline Vapors Caution in the Preface section.

Caution: Refer to Relieving Fuel Pressure Caution in the Preface section.

An improperly functioning EVAP canister can cause problems with the engine driveability and/or vehicle refueling. The canister can become plugged, with some internal obstruction or liquid fuel, or develop an air leak.

Stalling or poor driveability can be caused by a fuel saturated canister.

1. Disconnect the EVAP canister purge line at the underbody and look for liquid fuel in the line.

Important: If liquid fuel is present in the canister, it must be replaced.

•	If liquid fuel is present, install a siphon hose on this line and attempt to draw out more fuel.

•	If fuel is in the canister, investigate vapor venting of the system. Refer to Diagnosing Fuel Filling Problems.

2. No canister purge function -- Check DTCs P0443, P0444, and P0445 and refer to this code in the Engine/Emissions Control section.

Evidence of fuel loss or fuel vapor odor can be caused by:

•	A cracked or damaged EVAP canister

•	A fuel saturated EVAP canister -- Evaluate as noted above.