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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 125 (Engine Controls And Fuel - 3.6L (LF4) - Diagnostic Information And Procedures (2 Of 3)) >> Diagnostic Information and Procedures >> DTC P0506 or P0507 >> Circuit/System Testing

Circuit/System Testing

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P0506

  1. Verify the following conditions do not exist:
    • Exhaust System - Restricted
    • Mechanical Condition - Engine Speed = Limited
    • Engine - Parasitic Load
    • If a condition exists 

      Repair as necessary

    • Go to next step: If no conditions exist 
  2. All OK.

P0507

  1. Verify the following conditions do not exist:
    • Vacuum leak @ Engine/Intake Manifold
    • Q38 Throttle Body - Binding or Sticking @ Closed
    • Positive Crankcase Ventilation System - Leaking/Incorrect connection/Restricted
    • If a condition exists 

      Repair as necessary

    • Go to next step: If no conditions exist 
  2. All OK.
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