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Home >> Chevrolet >> 2017 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Hybrid/EV Control System) >> Diagnostic Information and Procedures >> DTC P0506 or P0507: Idle Speed >> Circuit/System Verification

Circuit/System Verification

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  1. Verify no other DTCs are set.
    • If no other DTCs are set 
  2. Verify none of the conditions listed below exist:

    P0506

    • Excess deposits in the Q38 Throttle Body. Refer to Throttle Body Inspection and Cleaning .
    • Restricted exhaust
    • Mechanical conditions that limit engine speed
    • Parasitic load on the engine - For example, a transmission condition, a belt driven accessory condition.
    • If a condition exists 

      Repair as necessary.

    • If no condition exists 
  3. All OK

    P0507

    • Vacuum leaks
    • A throttle valve that does not close correctly
    • Verify the correct operation of the crankcase ventilation system. Inspect for the following conditions:
      • The routing of the positive crankcase ventilation (PCV) system
      • Vacuum leaks in the PCV system
    • If a condition exists 

      Repair as necessary.

    • If no condition exists 
  4. All OK
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