MIL ON - Vehicle Loses Power

GROUP: 28
NUMBER: 91-04
DATE: May 31, 1991

SUBJECT:
Check Engine Light-On, Vehicle Looses Power

MODEL(S):
All 5 cyl. Engines With Knock Sensor Ignition Pro. 1984

CONDITION:

^ OBD light (On Board Diagnostic) comes on while driving.
^ Engine looses power, performance is reduced.
^ Above normal engine noise or vibration.

SERVICE:

Excess oil in crankcase could be cause of noise or vibration. Check engine oil level, and capacity. Adjust engine oil level as needed.

Note:
Knock sensor vehicles not equipped with an engine check light can also be affected by over-filling with engine oil.