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Home >> Hyundai >> 2021 >> Veloster Turbo >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis - 1.6L (3 Of 3) >> DTC P2251-00: O2 Sensor Reference Ground Circuit/Open (Bank 1 Sensor 1) >> Wiring Inspection >> Circuit Inspection

Circuit Inspection

Item Normal value Prerequisite condition (+) Probe (-) Probe
Virtual Ground Circuit: Resistance (Open) Approx. below 1Ω
  1. Ignition switch: OFF
  2. Sensor, ECM connector: Disconnected
Virtual Ground Terminal (HO2S (S1) connector) Virtual Ground Terminal (ECM connector)
  1. Is the result within specifications?

    YES 

    • Go to next step as below.

    NO