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Home >> Chevrolet >> 2018 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 35 (Engine Controls And Fuel - 1.4L (LV7) - DTC P0351 To DTC P2544 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0506 or P0507: Idle Speed Low/High >> Circuit/System Testing

Circuit/System Testing

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P0506

  1. Verify the conditions listed below do not exist.
    • Restricted exhaust
    • Mechanical conditions that limits engine speed
    • Parasitic load on the engine - For example, a transmission condition, a belt driven accessory condition.
    • If a condition is found 

      Repair as necessary.

    • If a condition is not found 
  2. All OK.

P0507

  1. Verify the conditions listed below do not exist.
    • Vacuum leaks
    • A throttle valve that does not close correctly
    • Verify the correct operation of the crankcase ventilation system. Inspect for the conditions listed below:
      • Improper routing of the positive crankcase ventilation (PCV) system
      • Vacuum leaks in the PCV system.
    • If a condition is found 

      Repair as necessary.

    • If a condition is not found 
  2. All OK.
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