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Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 891 (Engine Control System (Diagnostic Codes & Symptom Tests)) >> DTC/Circuit Diagnosis >> DTC P050A, P050B, P050E: Cold Start Control >> DTC Logic >> DTC Detection Logic

DTC Detection Logic

WARNING: This page is about a different car, the 2013 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: If DTC P050A, P050B or P050E is displayed with other DTC, first perform the trouble diagnosis for other DTC.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P050A Cold start idle air control system performance ECM does not control engine idle speed properly when engine is started with pre-warming up condition.
  • Lack of intake air volume
  • Fuel injection system
  • ECM 
P050B Cold start ignition timing performance ECM does not control engine timing properly when engine is started with pre-warming up condition.
P050E Cold start engine exhaust temperature too low The temperature of the catalyst inlet does not rise to the proper temperature when the engine is started with pre-warming up condition.
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