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Home >> Hyundai >> 2004 >> Elantra GLS, Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel System >> DTC Trouble Shooting Procedures >> DTC P1166: O2 Sensor System Lambda Bank Controller At The Limit (Bank 1) >> Inspection Procedures >> 1. Check DTC Relating To HO2S, Fuel System, EVAP System, Or Ignition System
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1. Check DTC Relating To HO2S, Fuel System, EVAP System, Or Ignition System

  1. Connect a Hl-Scan (Pro) to the data link connector.
  2. Turn ignition switch to ON position and monitor any other DTCs.

Are DTCs relating to HO2S, fuel system, EVAP system, or ignition system set? 

No: Go to next step.

Yes: Do all repairs associated with those codes before proceeding with this procedure.

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