Fails Emission Test

SYMPTOM: Fails Emission Test

CHECK:
1. Three Way Catalytic Converter (TWC)
2. Evaporative Emission Controls (EVAP)
3. Exhaust Gas Recirculation (EGR) System (12)
4. Manifold Absolute Pressure Sensor (3) (5)
5. Fuel Pressure regulator
6. Fuel Injector
7. Fuel Injector Resistor
8. Fuel Metering (43)(44)(45)(46)
9. Oxygen Sensor (1)(2)(41)(42)
10. Electronic Control Module (ECM)(**)
11. Engine Coolant Temperature (ECT) Sensor (6)
12. Positive Crankcase Ventilation (PCV)

Numbers in parentheses are the blink codes displayed at the MALFUNCTION INDICATOR LAMP. (**) MALFUNCTION INDICATOR LAMP is not on, or stays on without blinking. For ECM trouble code extraction procedures Testing and Inspection