OBD System Description - Cold Start Performance Monitor
OBD System Description - Cold Start Performance MonitorSystem Description / Monitoring Procedure
The ECM retards the ignition timing and increases the idle air to quickly increase the catalyst temperature at cold start to reduce emissions. The ECM monitors the ignition timing and the idle air for cold start. If the idle air or the ignition timing is out of specification, the ECM will set DTC.
DTC Description / Detecting Condition / Confirmation Procedure
P050A, P050B
Refer to DTC P050A / P050B. P050A
Cold Start Idle Air Control System Performance Monitor
