| Engine Code | Engine Code Description |
|---|
| P1000 | OBD-II Monitor Testing Incomplete |
| P1001 | KOER Test Cannot Be Completed |
| P1039 | Vehicle Speed Signal Missing or Improper |
| P1051 | Brake Switch Signal Missing or Improper |
| P1100 | Mass Air Flow Sensor Intermittent |
| P1101 | Mass Air Flow Sensor out of Self-Test Range |
| P1112 | Intake Air Temperature Sensor Intermittent |
| P1116 | Engine Coolant Temperature Sensor is out of Self-Test Range |
| P1117 | Engine Coolant Temperature Sensor Intermittent |
| P1120 | Throttle Position Sensor out of range |
| P1121 | Throttle Position Sensor Inconsistent with Mass Air Flow Sensor |
| P1124 | Throttle Position Sensor out of Self-Test Range |
| P1125 | Throttle Position Sensor Intermittent |
| P1127 | Heated Oxygen Sensor Heater not on During KOER Test |
| P1128 | Heated Oxygen Sensor Signals reversed |
| P1129 | Heated Oxygen Sensor Signals reversed |
| P1130 | Lack of Upstream Heated Oxygen Sensor Switch - Adaptive Fuel Limit - Bank No. 1 |
| P1131 | Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1 |
| P1132 | Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Rich - Bank No. 1 |
| P1135 | Ignition Switch Signal Missing or Improper |
| P1137 | Lack of Downstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1 |
| P1138 | Lack of Downstream Heated Oxygen Sensor Switch - Sensor Indicates Rich - Bank No. 1 |
| P1150 | Lack of Upstream Heated Oxygen Sensor Switch - Adaptive Fuel Limit - Bank No. 2 |
