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Home >> Saturn >> 2008 >> Astra XR, 2D Hatchback, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - DTC P0341 To DTC P2544 >> DTC P050A >> Circuit/System Testing

Circuit/System Testing

  1. If there are any other DTCs set, diagnose those first.
  2. Inspect for any condition that can reduce idle speed by increasing engine load.
    • Incorrect torque converter clutch (TCC) operation
    • Accessories that require additional torque to operate
    • Excessive deposits in the throttle body
    • Restricted exhaust
    • Mechanical conditions that limit engine speed
  3. Inspect for the following conditions:
    • Vacuum leaks
    • A faulty positive crankcase ventilation (PCV) valve
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