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Home >> Saturn >> 2007 >> Vue Red Line, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 3.5L (L66) - DTC P0506 To DTC P2199 >> DTC P2172 >> Circuit/System Testing

Circuit/System Testing

  1. Ensure proper operation of the CKP sensor. Refer to DTC P0335 or P0336 .
  2. Ensure proper operation of the transmission output speed sensor (OSS). Refer to DTC P0722 .
  3. Inspect for any condition that can increase idle speed.
    • Vacuum leaks
    • Un-metered air entering the engine, after the mass airflow
    • A faulty positive crankcase ventilation (PCV) valve
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