Item

Occurrence

Possible cause

Action

1

After replacing oil, sound occurs when starting engine

Oil shortage in oil passage

• Maintain the engine speed between 2,000 to 3,000 rpm for approx. 2 s and 10 min^*, and verify that the sound disappears.

• If the sound disappears, the HLA is normal.

• If the sound does not disappear, go to item 5.

2

Sound occurs at instant when engine is started on vehicle left for 1 day

3

Starter cranked for 3 s or more and sound occurs directly after engine is started

HLA oil shortage

4

Sound occurs directly after engine is started with newly replaced HLA

5

Sound occurs continuously for 10 min or more

Insufficient oil pressure

• Inspect the oil pressure. (See OIL PRESSURE INSPECTION [SKYACTIV-G 2.5].)

• If less than the specification, inspect each part of the engine.

HLA malfunction

• Inspect the HLA. (See HLA Inspection.)

6

Sound occurs during idling after high-speed driving

Incorrect engine oil level

• Inspect the engine oil level. (See ENGINE OIL LEVEL INSPECTION [SKYACTIV-G 2.5].)

Engine oil deterioration

• Replace the engine oil. (See ENGINE OIL REPLACEMENT [SKYACTIV-G 2.5].)