| Engine Code | Engine Code Description |
|---|
| P1484 | Variable Load Control Module Pin 1 Open |
| P1500 | Vehicle Speed Sensor Intermittent |
| P1501 | Programmable Speedometer & Odometer Module/Vehicle Speed Sensor Intermittent circuit-failure |
| P1502 | Invalid or Missing Vehicle Speed Message or Brake Data |
| P1504 | Intake Air Control circuit malfunction |
| P1505 | Idle Air Control System at Adaptive Clip |
| P1506 | Idle Air Control Over Speed Error |
| P1507 | Idle Air Control Under Speed Error |
| P1512 | Intake Manifold Runner Control Stuck Closed |
| P1513 | Intake Manifold Runner Control Stuck Closed |
| P1516 | Intake Manifold Runner Control Input Error |
| P1517 | Intake Manifold Runner Control Input Error |
| P1518 | Intake Manifold Runner Control fault - Stuck Open |
| P1519? | Intake Manifold Runner Control Stuck Open |
| P1520? | Intake Manifold Runner Control circuit fault |
| P1519? | Intake Manifold Runner Control fault - Stuck Closed |
| P1520? | Intake Manifold Runner Control fault |
| P1530 | Open or Short to A/C Compressor Clutch circuit |
| P1537 | Intake Manifold Runner Control Stuck Open |
| P1538 | Intake Manifold Runner Control Stuck Open |
| P1539 | Power to A/C Compressor Clutch circuit Exceeded Normal Current Draw |
| P1549 | Intake Manifold Temperature Valve Vacuum Actuator Connection |
| P1550 | Power Steering Pressure Sensor out of Self-Test Range |
