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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 86 (Engine Controls And Fuel - 1.4L (LUJ LUV) - DTC P0300 To DTC P2635 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0506 or P0507: Idle Speed Low/High >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2015 Chevrolet Trax and 2015 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.

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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