Typical Enabling Conditions
WARNING: This page is about a different car, the 2007 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
All:
TYPICAL ENABLING CONDITIONS
| The monitor will run whenever these DTCs are not present | None |
P0451 (Noise monitor):
TYPICAL ENABLING CONDITIONS
| Atmospheric pressure | 70 to 110 kPa (525 to 825 mmHg) |
| Battery voltage | 10.5 V or more |
| IAT | 4.4 to 35°C (40 to 95°F) |
| EVAP pressure sensor malfunction (P0450, P0452, P0453) | Not detected |
| Either of the following conditions 1 or 2 is met | - |
| 1. Engine condition | Running |
| 2. Time after key-off | 5 or 7 or 9.5 hours |
P0451 (Stuck monitor):
TYPICAL ENABLING CONDITIONS
| Battery voltage | 10.5 V or more |
| IAT | 4.4 to 35°C (40 to 95°F) |
| EVAP pressure sensor malfunction (P0450, P0452, P0453) | Not detected |
| Atmospheric pressure | 70 to 110 kPa (525 to 825 mmHg) |
| Time after key-off | 5 or 7 or 9.5 hours |
P0450, P0452 and P0453:
TYPICAL ENABLING CONDITIONS
| Ignition switch | ON |
| Battery voltage | 8 V or more |
| Starter | OFF |