OBD II Monitor Specifications
Monitor Strategy
MONITOR STRATEGY (DTC P0450/0451/0452/0453)
| Required Sensors/Components | Pump module |
|---|---|
| Frequency of Operation | Once per driving cycle: P0451 sensor stuck Continuous: P0451 sensor noising, P0450, P0452 and P0453 |
| Duration | - |
| MIL Operation | Immediate: P0450, P0452 and P0453 2 driving cycles: P0451 |
| Sequence of Operation | None |
Typical Enabling Conditions
P0451: (Noise monitor):
TYPICAL ENABLING CONDITIONS - NOISE MONITOR (DTC P0451)
| Monitor runs whenever these DTCs not present | See LIST OF DISABLE A MONITOR |
| Atmospheric pressure (absolute pressure) | 70 kPa (525 mmHg) or more, less than 110 kPa (825 mmHg) |
| Battery voltage | 10.5V or more |
| Either of following conditions met | A or B |
| A. Engine | Running |
| B. Soak time (ignition switch OFF time) | 5 hours |
| Intake air temperature | 4.4° to 35°C (40° to 95°F) |
P0451 (Stuck monitor):
TYPICAL ENABLING CONDITIONS - STUCK MONITOR (DTC P0451)
| Monitor runs whenever these DTCs not present | See LIST OF DISABLE A MONITOR |
| Atmospheric pressure (absolute pressure) | Less than 70 kPa (525 mmHg), or 110 kPa (825 mmHg) or more |
| Batten/voltage | 10.5V or more |
| Engine | Not running |
| Soak time (ignition switch OFF time) | 5 hours |
| Intake air temperature | 4.4° to 35°C (40° to 95°F) |
P0450, P0452 and P0453:
TYPICAL ENABLING CONDITIONS (DTC P0450/0452/0453)
| Monitor runs whenever these DTCs not present | See LIST OF DISABLE A MONITOR |
| Ignition switch | OFF |
Typical Malfunction Thresholds
- P0450: Pressure sensor voltage abnormal fluctuationTYPICAL MALFUNCTION THRESHOLDS (DTC P0450)
Pressure sensor voltage Less than 0.45 V, or more than 4.9 V - P0451: Pressure sensor noiseTYPICAL MALFUNCTION THRESHOLDS - PRESSURE SENSOR NOISE (DTC P0451)
Pressure variation indicated by pressure sensor in 10 seconds More than +/-0.3 kPa (+/- 2.25 mmHg) 10 times - P0451: Pressure sensor stuckTYPICAL MALFUNCTION THRESHOLDS - PRESSURE SENSOR STUCK (DTC P0451)
0.02 inch leak pressure variation indicated by pressure sensor in 10 seconds Less than 0.8 kPa (6 mmHg) - P0452: Pressure sensor low voltageTYPICAL MALFUNCTION THRESHOLDS (DTC P0452)
Pressure sensor voltage Less than 0.45 V - P0453: Pressure sensor high voltage
TYPICAL MALFUNCTION THRESHOLDS (DTC P0453)
| Pressure sensor voltage | More than 4.9V |