| Code 12 |
No distributor reference pulse (diagnostic test active) |
| Code 13 |
Oxygen sensor circuit open or no activity |
| Code 14 |
Engine coolant temp sensor error (high temp indicated) |
| Code 15 |
Engine coolant temp sensor error (low temp indicated) |
| Code 16 |
System voltage too low |
| Code 17 |
Camshaft position sensor error |
| Code 21 |
Throttle position sensor error (signal high) |
| Code 22 |
Throttle position sensor error (signal low) |
| Code 23 |
Intake air temp sensor error (low temp indicated) |
| Code 24 |
Vehicle speed sensor error (open circuit or no activity) |
| Code 25 |
Intake air temp sensor error (high temp indicated) |
| Code 26 |
Quad Driver Module (QDM A) error |
| Code 28 |
Auto transmission range pressure switch error |
| Code 31 |
Wastegate solenoid circuit error |
| Code 31 |
Gear Position Switch (PRNDL) error |
| Code 32 |
Baro sensor circuit error / EGR circuit Error / MAP sensor signal open |
| Code 33 |
MAP sensor circuit error (signal high indicating low vacuum) |
| Code 34 |
MAP sensor circuit error (signal low indicating high vacuum) |
| Code 35 |
IAC problem or idle error |
| Code 36 |
MAF sensor error / 24x crankshaft position sensor circuit error / 4T60-E Shifting error |
| Code 37 |
TCC brake switch circuit error |
| Code 38 |
TCC brake switch circuit error |
| Code 39 |
Clutch switch circuit error / Torque converter clutch error |
| Code 41 |
Ignition control error / MEM-CAL error / C³I Cam Sensor Signal error |
| Code 42 |
Ignition bypass circuit error |
| Code 43 |
Knock sensor error |
| Code 44 |
Oxygen sensor error (lean condition indicated) |
| Code 45 |
Oxygen sensor error (rich condition indicated) |
| Code 46 |
Pass-Key II (VATS) system error - circuit out of freq range |
| Code 47 |
UART (serial data) circuit error |
| Code 51 |
PROM error / Incorrect MEM-CAL |
| Code 52 |
Fuel cal-pak incorrect or missing |
| Code 53 |
System voltage too high |
| Code 53 |
Digital EGR valve solenoid 1 error |
| Code 54 |
Fuel pump circuit low voltage / Digital EGR valve solenoid 2 error |
| Code 55 |
ECM error / Digital EGR valve solenoid 3 error |
| Code 56 |
Quad Driver Module (QDM B) error |
| Code 57 |
Boost control error |
| Code 58 |
Trans fluid temp sensor circuit error (low voltage) / VATS system error |
| Code 59 |
Trans fluid temp sensor circuit error (high voltage) |
| Code 61 |
A/C system performance |
| Code 63 |
Right bank O2 sensor circuit error / MAP sensor circuit signal voltage high (low vacuum indicated) |
| Code 64 |
Right bank O2 sensor lean exhaust indicated / MAP sensor circuit signal voltage low (high vacuum indicated) |
| Code 65 |
Right bank O2 sensor rich exhaust indicated |
| Code 66 |
A/C pressure sensor circuit error (low pressure indicated) |
| Code 67 |
A/C pressure sensor circuit error |
| Code 68 |
A/C clutch relay circuit error (shorted to ground) |
| Code 69 |
A/C clutch relay circuit error (open circuit indicated) / A/C high pressure switch error |
| Code 70 |
A/C pressure sensor circuit error (high pressure indicated) |
| Code 71 |
A/C evaporator temp sensor circuit error (low temp indicated) |
| Code 72 |
VSS signal circuit error |
| Code 73 |
A/C evaporator temp sensor circuit error (high temp indicated) |
| Code 75 |
Digital EGR solenoid #1 circuit error |
| Code 76 |
Digital EGR solenoid #2 circuit error |
| Code 77 |
Digital EGR solenoid #3 circuit error |
| Code 79 |
Transmission fluid over temp |
| Code 80 |
Transmission component slipping |
| Code 82 |
3x crankshaft position sensor circuit error |
| Code 85 |
PROM error |
| Code 86 |
ECM Analog/Digital error |
| Code 87 |
EEPROM error (flash memory error) |
| Code 90 |
TCC error |
| Code 93 |
Transmission pressure control solenoid circuit error |
| Code 96 |
Transmission system voltage low |
| Code 98 |
Invalid PCM program |
| Code 99 |
Invalid PCM program |