System Tests (Evaporative Emissions): Notes
NOTE:
Prior to performing any system test, see HOW TO USE SYSTEM TESTS under SYSTEM TESTS. If instructed to replace Powertrain Control Module (PCM) after performing a system test, new PCM must be programmed. See PROGRAMMING PCM .
Perform these tests when instructed during QUICK TEST or if directed here from DIAGNOSTIC TROUBLE CODE DEFINITIONS . Perform appropriate system test, see EVAPORATIVE EMISSIONS DIAGNOSTIC TROUBLE CODE REFERENCE table. For emission-related symptom tests, see TROUBLE SHOOTING - NO CODES table. For component reference, see Fig 1-Fig 3 .
EVAPORATIVE EMISSIONS DIAGNOSTIC TROUBLE CODE REFERENCE
| DTC | Description | Go To Test |
|---|---|---|
| P0442 | Small Leak Detected In EVAP System | A |
| P0455 | Major Leak Or No Flow Detected In EVAP System | B |
| P0456 | Very Small Leak Detected In EVAP System | A |
| P0457 | Fuel Filler Cap Off | A |
| P1443 | Very Small Or No Purge Flow Detected In EVAP System | B |
| P1450 | Excessive Vacuum Detected In Fuel Tank | C |