Comprehensive Component (Engine Output) Monitor

OBD System Description - Comprehensive Component Monitor (Engine Output)

DTC Description / Detecting Condition / Confirmation Procedure

P0444
Refer to DTC P0444 / P0496: Evaporative Emission Control System Purge Control Valve Circuit Open / EVAP System Flow during Non-Purge:H25 Engine.

P0445
Refer to DTC P0445: Evaporative Emission Control System Purge Control Valve Circuit Shorted:H25 Engine.

P0447
Refer to DTC P0447: Evaporative Emission Control System Vent Control Circuit Open:H25 Engine.

P0448
Refer to DTC P0448: Evaporative Emission Control System Vent Control Circuit Shorted:H25 Engine.

P0505, P0506, P0507
Refer to DTC P0505 / P0506 / P0507: Idle Control System / RPM Lower than Expected / RPM Higher than Expected:H25 Engine.

IAC System Monitor

Monitoring procedure
The Idle Air Control (IAC) solenoid functionally checked by monitoring the closed loop idle speed correction required to maintain the desired idle rpm. If the proper idle rpm cannot be maintained and the system has a high rpm (+200) or low rpm error (-100) greater than the malfunction threshold, an IAC malfunction is indicated. (P0507, P0506)