For 1990-2009 cars

Concern | Action
--- | ---
External oil leak. | Inspect for any of the following conditions:

• | Plugged positive crankcase ventilation (PCV).

• | Plugged or kinked PCV hose(s).

• | Damaged or incorrectly installed PCV or hose(s).

• | Above acceptable crankcase pressure.

Rough Idle. | Inspect for any of the following conditions:

• | Plugged PCV.

• | Plugged or kinked PCV hose(s).

• | Leaking (damaged) PCV or hose(s).

Stalling or slow idle speed. | Inspect for any of the following conditions:

• | Plugged PCV.

• | Plugged or kinked PCV hose(s).

• | Leaking (damaged) PCV or hose(s).

High idle speed. | Inspect for a leaking (damaged) PCV or hose(s).
Sludge in the engine. | Inspect for any of the following conditions:

• | Plugged PCV.

• | Plugged or kinked PCV hose(s).