EVAP Control System Monitor
Operation
EVAP CONTROL SYSTEM MONITOR OPERATION
| DTCs | P0441 |
| Monitor execution | Once per driving cycle |
| Sensors / components OK | Vehicle speed, MAF, TP, ECT, IAT, Barometric pressure, Fuel level, IAC control system, Back-up Power, Primary / Secondary HO2, Primary / Secondary HO2S Heater |
| Monitoring Duration | 5 s |
EVAP CONTROL SYSTEM MONITOR OPERATION
| DTCs | P0456 (very small leak) |
| Monitor execution | Once per driving cycle |
| Sensors / components OK | IAT, ECT, BARO and EVAP leak check pressure, Fuel level, Back-up power for driving conditions before engine off IAT, ECT, EVAP leak check pressure, VSS for monitoring conditions |
| Monitoring Duration | 695 s |
EVAP CONTROL SYSTEM MONITOR OPERATION
| DTCs | P1420 |
| Monitor execution | Once per driving cycle |
| Sensors / components OK | IAT, ECT, BARO and EVAP leak check pressure, Fuel level, Back-up power for driving conditions before engine off IAT, ECT, EVAP leak check pressure, VSS for monitoring conditions |
| Monitoring Duration | 245 s |
EVAP CONTROL SYSTEM MONITOR OPERATION
| DTCs | P1421 |
| Monitor execution | Once per driving cycle |
| Sensors / components OK | IAT, ECT, BARO and EVAP leak check pressure, Fuel level, Back-up power for driving conditions before engine off IAT, ECT, EVAP leak check pressure, VSS for monitoring conditions |
| Monitoring Duration | 245 s |
EVAP CONTROL SYSTEM MONITOR OPERATION
| DTCs | P1422 |
| Monitor execution | Once per driving cycle |
| Sensors / components OK | IAT, ECT, BARO and EVAP leak check pressure, Fuel level, Back-up power for driving conditions before engine off IAT, ECT, EVAP leak check pressure, VSS for monitoring conditions |
| Monitoring Duration | 95 s |
EVAP CONTROL SYSTEM MONITOR OPERATION
| DTCs | P1424 |
| Monitor execution | Once per driving cycle |
| Sensors / components OK | IAT, ECT, BARO and EVAP leak check pressure, Fuel level, Back-up power for driving conditions before engine off IAT, ECT, EVAP leak check pressure, VSS for monitoring conditions |
| Monitoring Duration | 95 s |
EVAP CONTROL SYSTEM MONITOR OPERATION
| DTCs | P1425 |
| Monitor execution | Once per driving cycle |
| Sensors / components OK | IAT, ECT, BARO and EVAP leak check pressure, Fuel level, Back-up power for driving conditions before engine off IAT, ECT, EVAP leak check pressure, VSS for monitoring conditions |
| Monitoring Duration | 100 s |
Enable conditions
EVAP CONTROL SYSTEM MONITOR ENABLE CONDITIONS
| Parameter | Minimum | Maximum |
|---|---|---|
| P0441 | ||
| Engine coolant temp. | 74 (165) °C (°F) | 110 (230) °C (°F) |
| IAC control system | Feedback mode | |
| EVAP purge duration time | 320 s | |
| Vehicle speed met before | 3.2 (2) km/h (mph) | |
| Fuel system status | Closed loop mode | |
| EVAP purge valve control | On | |
| Enrichment mode | Off | |
| Barometric pressure | 74.5 kPa | |
| Misfire | No DTC | |
| EGR system monitor | No DTC | |
| Fuel system | No DTC | |
| P0456, P1420, P1421, P1422, P1424, P1425 | ||
| Wake-up conditions to start EVAP leak monitor system | ||
| Duration time from engine off | 5 h | |
| Fuel level | 85% | |
| ECM check sum | No DTC | |
| Wake-up function (P0607) | No DTC | |
| Refuel during engine off | No | |
| Monitoring conditions | ||
| Intake air temp. | 0 (32) °C (°F) | 50 (122) °C (°F) |
| Engine coolant temp. | 4 (39) °C (°F) | 45 (113) °C (°F) |
| Vehicle speed | 3.8 (2.4) km/h (mph) | |
| BARO | 74.5 kPa | |
| Baro difference | 1.0 kPa | |
| Battery voltage | 11 V | |
| Refuel during leak monitoring | No | |
| EVAP canister vent valve circuit | No DTC | |
| EVAP leak detecting pump | No DTC | |
Typical malfunction thresholds
EVAP CONTROL SYSTEM MONITOR TYPICAL MALFUNCTION THRESHOLDS
| P0441 |
| Calculated load value change < 2.3% |
| IAC air flow change < 15 L/min |
| Fuel system change < 10% |
| P0456 |
| 1.0 ≤ Initial pressure - Reference pressure ≤ 4.5 kPa |
| EVAP system maximum pressure - EVAP system minimum pressure ≥ 0.2 kPa |
| EVAP system minimum pressure - Reference pressure > 0 kPa |
| P1420 |
| 1.0 ≤ Initial pressure - Reference pressure ≤ 4.5 kPa |
| EVAP system maximum pressure - Reference pressure < 0.2 kPa |
| EVAP system minimum pressure - Reference pressure ≥ 0.2 kPa |
| P1421 |
| 1.0 ≤ Initial pressure - Reference pressure ≤ 4.5 kPa |
| EVAP system maximum pressure - EVAP system minimum pressure < 0.2 kPa |
| EVAP system minimum pressure - Reference pressure < -0.2 kPa |
| P1422 |
| Initial pressure - Reference pressure < 0.2 kPa |
| P1424 |
| Initial pressure - Reference pressure > 4.5 kPa |
| P1425 |
| 0.2 ≤ Initial pressure - Reference pressure < 1.0 kPa |
| EVAP system maximum pressure - Reference pressure ≥ 0.2 kPa |