OBD System Description - Cold Start Performance Monitor

OBD System Description - Cold Start Performance Monitor

System 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 starts. 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

Operation






Enabled conditions






Typical malfunction threshold