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Home >> Kia >> 2021 >> Niro Plug-In Hybrid LXS >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis (PHEV) (2 Of 6) >> DTC P0133-00: O2-Sensor Circuit Slow Response (Bank 1/Sensor 1) >> Wiring Inspection >> Basic Inspection >> Notes
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Basic Inspection: Notes

WARNING: PHEV battery system uses high voltage.
It may cause death or damage due to electrical shock, if you do not follow below Instructions.
  • Follows instructions of Service Information..
  • Wear and use insulated gloves and tools.
  • Ignition "OFF", Disconnect ground cable of auxiliary battery and "OFF" the safety connector of the high voltage battery.
  • Check high voltage terminal on Power Relay Assembly is lower than 30V.
  • Be careful that it should not be short between terminals when measuring battery cell voltage. You may be injured due to spark, parts damage or electrical shock.
  • Metallic material cause high voltage short that may cause damage of life or vehicle. Therefore, get rid of all the metallic material before working. (Metallic Material: Watch, Ring, any metallic products etc.)
  • After disconnect high voltage cable, be careful not to happen short between exposed terminals on high voltage connector.