Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Genesis >> 2017 >> G90 3.3T Premium, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 4) - 3.3L >> DTC P0135: O2 Sensor Heater Circuit (Bank 1 Sensor 1) >> Wiring Inspection >> Power Circuit Inspection

Power Circuit Inspection

■ Check voltage 

  1. IG "OFF". Disconnect HO2S connector.
  2. IG "ON".
  3. Measure voltage between Heater Power terminal of the HO2S harness connector and chassis ground.

    Specification:  B+

  4. Is voltage display near the specified value?

    YES 

    NO 

    • Check for open or short in the power supply circuit between the main relay and the HO2S. Especially check for "15A Sensor 2 fuse" is installed and not blown. Repair as necessary and go to "Verification of Vehicle Repair " procedure.
NOTE: HO2S must have a clean air reference to function properly. The air is obtained by way of the sensor wire (s). Do not attempt to repair the wire (s), connector, or the terminals.
scientia non olet · About Mike's Workshop Manuals