Concern and OASIS Number

Concern OASIS #
Exhaust System Concerns 403000
(Visual Smoke or Odor)

Symptom Action to Take

Odor From Exhaust System Go to 23-1. 23-1 Check Exhaust System

Black Smoke Go to 23-3. 23-3 Check Air Intake System
- Rich Mixture

Blue Smoke Go to 23-6. 23-6 Check Positive Ventilation (PCV) System
- Burning Oil

White Smoke Go to 23-8. 23-8 Check Bypass Air (BPA) Control System
- Coolant in Combustion Chamber