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12 = ERROR CODE DIAGNOSTIC SYSTEM FUNCTIONING CORRECTLY

13 = OXYGEN SENSOR CIRCUIT OPEN

14 = COOLANT TEMPERATURE SENSOR (CTS) CIRCUIT (HIGH TEMP)

15 = COOLANT TEMPERATURE SENSOR (CTS) CIRCUIT (LOW TEMP)

21 = THROTTLE POSITION SENSOR (TPS) CIRCUIT (HIGH)

22 = THROTTLE POSITION SENSOR (TPS) CIRCUIT (LOW)

23 = MANIFOLD AIR TEMP (MAT) or INTAKE AIR TEMP (IAT) CIRCUIT (LOW TEMP)

24 = VEHICLE SPEED SENSOR (VSS) CIRCUIT

25 = MANIFOLD AIR TEMP (MAT) or INTAKE AIR TEMP (IAT) CIRCUIT (HIGH TEMP)

26 = QUAD-DRIVER (QDM) ERROR (if applicable)

32 = EXHAUST GAS RECIRCULATION (EGR) CIRCUIT

33 = MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR (VOLTAGE HIGH-LOW VACUUM)

34 = MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR (VOLTAGE LOW-HIGH VACUUM)

35 = IDLE SPEED CONTROL (ISC) CIRCUIT

41 = CYLINDER SELECT ERROR (FAULTY OR INCORRECT MEM-CAL)

42 = ELECTRONIC SPARK TIMING (EST) CIRCUIT

43 = ELECTRONIC SPARK CONTROL (ESC) CIRCUIT

44 = OXYGEN SENSOR CIRCUIT (LEAN EXHAUST)

45 = OXYGEN SENSOR CIRCUIT (RICH EXHAUST)

51 = MEM-CAL ERROR (FAULTY OR INCORRECT MEM-CAL)

53 = SYSTEM OVER VOLTAGE

54 = FUEL PUMP CIRCUIT (LOW VOLTAGE)

55 = ECM ERROR

61 = DEGRADED OXYGEN SENSOR

66 = A/C PRESSURE SENSOR CIRCUIT