Diagnostics and checks (1.8/2.0/1.6 Zetec-E)

Inspection and verification

1. Check the customer complaint.

2. Visually inspect for obvious signs of mechanical damage.

Visual inspection table

Mechanical factors:

• Vacuum line(s)
• Hose(s)/hose connections
• Gasket(s)
• Positive Crankcase Ventilation (PCV) Valve
• Engine Crankcase Ventilation Valve Oil Separator

3. If an obvious cause for the problem you have identified or the customer has described is found, correct it (if possible) before proceeding with further actions.

4. If the problem is not visually obvious, check the symptom and refer to the Symptom Table.

Table of signs of malfunction

State	Possible Causes	Action
•Increased pressure in the engine crankcase	•PCV line(s)/hose(s) •PCV valve •Crankcase ventilation valve oil separator	•CHECK PCV system components for blockages and damage. CLEAN or INSTALL new components if necessary.
	•Worn or damaged engine components	•For additional information, refer to Section 303-01A / 303-01B / 303-01C / 303-01D / 303-01E.