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Home >> Saturn >> 2008 >> Astra XE, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - DTC P0341 To DTC P2544 >> DTC P0506 or P0507 >> Circuit/System Testing

Circuit/System Testing

  1. 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
  2. Inspect for vacuum leaks.
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