OBD System Description - EVAP Control System Monitor

OBD System Description - EVAP Control System Monitor

System Description / Monitoring Procedure

To monitor the EVAP control system, a fuel tank pressure sensor and an EVAP canister air (vent) valve are added to the system.

The monitoring system measures pressure change of closed EVAP system circuit under the depressurized condition. The system also measures pressure change of closed circuit to compensate evaporative pressure with the normal range pressure, if necessary.

EVAP System Monitoring System (ORVR)





EVAP System Monitoring Procedure










DTC Description / Detecting Condition / Confirmation Procedure

P0442, P0455

Refer to P0442 DTC P0442 / P0455: Evaporative Emission Control System Leak Detected (Small Leak) / (Gross Leak).

EVAP Control System Monitor

Operation





Enable condition





Typical malfunction thresholds






MODE $06 Data