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Home >> Hyundai >> 2015 >> Sonata Eco >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 57 (Engine Control System Diagnosis (2 Of 2) (HEV)) >> DTC P2271: O2 Sensor Signal Stuck Rich (Bank 1 Sensor 2) >> W/Harness Inspection >> Terminal and Connector Inspection

Terminal and Connector Inspection

WARNING: This page is about a different variant/trim than selected.
  1. Ignition "ON" & Engine "OFF".
  2. Monitor the O2 SNSR VOL.-B1/S2 parameter on the GDS data list while wiggling the wiring harness and related connectors. Refer to "Signal Waveform & Data " in the "General Information" procedure.
  3. The value should remain more or less unchanged. If not, check for the following conditions:
    • Check for corrosion on terminals
    • Check for terminal tension (at the HO2S and at the PCM)
    • Check for damaged wiring
    • Check the HO2S ground circuit for a good connection
    • Check the 15A sensor2 fuse
    • Check front and rear HO2S for connections being reversed.
  4. Was a problem found in any of the above areas?

    YES 

    NO 

    • Go to next step as below.