OBDII Code List

P050A SCION - Cold Start Idle Air Control System Performance

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Throttle body assembly
  • Mass air flow meter
  • Air induction system
  • PCV hose connections
  • VVT system
  • Air cleaner filter element
  • ECM

When is the code detected?

The temperature of the catalyst inlet does not rise to the proper temperature when the engine is started with pre-warming up condition.

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P050a Scion Description

The Electronic Throttle Control System (ETCS) controls the engine idling speed. The ETCS operates the throttle actuator to open and close the throttle valve, and adjusts the intake air amount to achieve the target idling speed. In addition, the ECM retards the ignition timing and the ETCS increases the intake air amount to quickly increase the catalyst temperature at cold start to reduce emissions.
OBDII Code P050a Scion - Cold Start Idle Air Control System Performance -

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P050A SCION Comments

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