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Home >> Hyundai >> 2017 >> Sonata Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 48 (Engine Control System Diagnosis - 2.0L (3 Of 3) (Except HEV)) >> DTC P2270: O2 Sensor Signal Stuck Lean (Bank 1 Sensor 2) >> Wiring Inspection >> Terminal and Connector Inspection

Terminal and Connector Inspection

WARNING: This page is about a different variant/trim than selected.
  1. IG "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 15 A sensor 2 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 below.
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