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Home >> Infiniti >> 2021 >> Q50 Pure, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (1 Of 6) >> Engine (ECM) >> DTC P0031: A/F Sensor 1 Heater >> DTC Description >> VR30DDTT engine >> DTC Detection Logic

DTC Detection Logic

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P0031

A/F SEN1 HTR (B1)

(HO2S heater control circuit low bank 1 sensor 1)

The current amperage in the A/F sensor 1 heater circuit is out of the normal range.

(An excessively low voltage signal is sent to ECM through the A/F sensor 1 heater.)
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