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Home >> Hyundai >> 2014 >> Elantra GT Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis - 2.0L (2 Of 2) >> DTC P2251: O2 Sensor Reference Ground Circuit/Open (Bank 1/Sensor 1) >> Wiring Inspection >> Vertual Ground Output Circuit Inspection

Vertual Ground Output Circuit Inspection

  1. IG "OFF" & Disconnect HO2S(S1) connector.
  2. IG "ON" & ENG "OFF".
  3. Measure the voltage between Vertual Ground Output terminal of HO2S(S1) harness connector and chassis ground.

    Specification:  Approx 2.5V

  4. Is the measured voltage within specification?

    YES 

    • Go to COMPONENT INSPECTION  procedure.

    NO 

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