| A1 & A2, "SERVICE ENGINE SOON" Light | See DIAGNOSTIC CIRCUIT CHECK In BASIC TESTING Article |
| A3, No Start | See NO START - ENGINE CRANKS OKAY In BASIC TESTING Article |
| A5, Fuel Pump Relay | See MOTORS, RELAYS & SOLENOIDS In This Article |
| A7, Fuel System Diagnosis | See BASIC FUEL SYSTEM CHECKS In BASIC TESTING Article |
| C1, MAP Sensor | See ENGINE SENSORS & SWITCHES In This Article |
| C1, Power Steering Pressure Switch | See ENGINE SENSORS & SWITCHES In This Article |
| C1, Park/Neutral Switch | See ENGINE SENSORS & SWITCHES In This Article |
| C2, Injector Balance Test | See FUEL CONTROL In This Article |
| C2, IAC Motor | See IDLE CONTROL SYSTEM In This Article |
| C2, ISC Motor | See IDLE CONTROL SYSTEM In This Article |
| C3, Canister Purge System | See EMISSION SYSTEMS & SUB-SYSTEMS In This Article |
| C4, EST Ignition Check | See BASIC IGNITION SYSTEM CHECKS In BASIC TESTING Article |
| C4, DIS Ignition "Misfire" | See DIS MISFIRE - 3.1L (VIN T) "W" BODY - C4F Chart In This Article. |
| C5, ESC Ignition Check | See IGNITION SYSTEM In This Article |
| C6, Air Injection System | See EMISSION SYSTEMS & SUB-SYSTEMS In This Article |
| C7, EGR System | See EMISSION SYSTEMS & SUB-SYSTEMS In This Article |
| C8, Torque Converter Clutch | See MISCELLANEOUS ECM CONTROLS In This Article |
| C8, Manual Trans. Shift Lights | See MISCELLANEOUS ECM CONTROLS In This Article |
| C10, A/C Clutch Control | (1) See MISCELLANEOUS ECM CONTROLS In This Article |
| C12, Electric Cooling Fan Control | (1) See MISCELLANEOUS ECM CONTROLS In This Article |
| (1) Also see ENGINE COOLING FAN article in the ENGINE COOLING section. |
