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Home >> Hyundai >> 2006 >> Accent Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 2) >> DTC Troubleshooting Procedures >> DTC P0171 System Too Lean (Bank 1) >> Monitor SCANTOOL Data

Monitor SCANTOOL Data

  1. Connect scantool to Data Link Connector (DLC).
  2. Warm up the engine to normal operating temperature.
  3. Monitor the "Parameters related to air/fuel ratio (HO2S, MAF, MAP, TPS, ECTS, PCSV, Injector, etc.)" on the scantool.
    Fig 1: [Scantool Display - Air/Fuel Ratio Parameters]
    G04801661
  4. Are the parameters displayed correctly?

    YES  : --> Fault is intermittent caused by poor contact in the sensor's and/or ECM/PCM's connector or was repaired and ECM/PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO  : --> Go to "TERMINAL AND CONNECTOR INSPECTION " procedure

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