Inspection Procedure

HINT: 

• DTC P050B may be stored when the engine shows the symptoms listed below. If necessary, check the trouble areas listed below.

  Symptoms	Factor	Trouble Area
  Low idle speed when engine cold	Excessive engine friction	Engine oil deterioration Drive belt tension A/C compressor Generator PS pump
  Rough idle when engine cold	Abnormal combustion	Fuel quality

• Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was moving or stationary, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.