Circuit/System Testing

P0506

• Inspect the engine for vacuum leaks.
• Inspect the throttle valve for the correct operation. A throttle valve that does not close correctly sets this DTC.
• 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

P0507

• Inspect for excess deposits in the throttle body.
• Inspect for a parasitic load on the engine-For example, a transmission condition, a belt driven accessory condition.