1.	Ignition pulse. No Igf signal (Check Ignitor & Coil Wiring)
2.	No Ne signal (check CAS)
3.	No G signal (Check CAS)
4.	SGC Signal (1.8 Only) - Check Cam Angle Sensor
8.	Airflow meter open or short circuit
9.	Water thermistor open or short circuit
10.	Intake air thermistor in airflow meter open or short circuit
12.	Throttle position sensor open or short circuit
14.	Atmospheric pressure sensor open or short circuit
15.	Oxygen sensor <0.55 V 180 sec after 1500 rpm
17.	Oxygen sensor unchanged after 1500 rpm
26.	Solenoid valve (Evaporative canister purge)
28.	EGR Solenoid Value -Vacuum (1.8 only) – Open or Short Circuit
29.	EGR Solenoid Vale -Vent (1.8 only) – Open or Short Circuit
34.	ISC Valve