2017 Infiniti QX30 BaseFACTORY OEM SERVICE PROCEDURE

DTC Detection Logic

DTC No. CONSULT screen terms DTC detecting condition
(Trouble diagnosis content) Malfunction type
P0138 12 Oxygen sensor bank1 sensor 2
(O2 Sensor Circuit High Voltage Bank 1 Sensor 2)		 CIRCUIT SHORT TO BATTERY Oxygen sensor has a short circuit to positive. There is a short circuit to positive.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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