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Home >> Hyundai >> 2008 >> Elantra GLS, Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel System (G4GC-GSL 2.0) >> DTC Troubleshooting Procedures >> DTC P0171 System Too Lean (Bank 1) >> System Inspection >> Positive Crankcase Ventilation System Inspection

Positive Crankcase Ventilation System Inspection

  1. Check the engine oil level. The oil level should be between the min. and max. marking. Fill to the correct oil level
  2. Check crankcase ventilation valve for improper installation, damaged o-rings and malfunctioning.
  3. Warm up the engine to normal operating temperature
  4. Connect Scantool and note the "SHORT TERM FUEL-B1" parameter on the Scantool data list.
  5. Disconnect and plug the positive crankcase ventilation at the intake manifold side
  6. Monitor the "SHORT TERM FUEL-B1" parameter on the Scantool data list once again.

    Specification : The value should remain more or less unchanged

  7. Is the displayed value within the specified value?

    YES 

    • Go to next step as below

    NO 

    • Check the PCV (Positive Crankcase Ventilation) valve for operation properly. Refer to "Engine". If OK, check that engine oil is diluted with fuel. Change the oil or filter as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure
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