Test Procedure

HG1 VISUAL INSPECTION OF THE PCV SYSTEM

Is a concern present?

Yes	No
REPAIR as necessary. Clear the PCM DTCs. REPEAT the self-test.	GO to HG2.

HG2 CHECK FOR LEAKS

Check for disconnected, damaged or restricted vacuum lines between the engine and any vacuum operated components.
Check for disconnected, damaged or restricted intake air system lines between the engine and any intake air system components.
Check for disconnected, damaged or restricted positive crankcase ventilation (PCV) system lines between the engine and any PCV components.
Visually inspect for a damaged or pinched PCV hose o-ring seal.
Visually inspect for a correctly installed oil level indicator or a damaged oil level indicator o-ring seal.
Check for a correctly installed oil cap.
Check for air leaks between the throttle body and intake valves.
Visually inspect the intake throttle plate for sticking or binding.

Is a concern present?

Yes	No
REPAIR as necessary. Clear the PCM DTCs. REPEAT the self-test.	GO to HG3.

HG3 PCV SYSTEM CHECK

Start the engine and warm it until the engine temperature is stable.
Disconnect the intake air system hose from the air cleaner outlet.
Place a stiff piece of paper over the disconnected intake air system hose opening. Wait 1 minute.

Does vacuum hold the paper in place?

Yes	No
The PCV system is OK. RETURN to SYMPTOM CHARTS for further direction.	CHECK for vacuum leaks or restrictions in the PCV system (such as oil cap, hoses, cut grommets, valve cover bolt torque or gasket leak). REPAIR as necessary. Clear the PCM DTCs. REPEAT the self-test.