DTC Detection Logic

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

P0031

A/F SEN1 HTR (B1)

(HO2S heater control circuit low bank 1 sensor 1)

Diagnosis condition

Engine running at idle

Signal (terminal)

A/F sensor 1 heater signal

Threshold

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

Diagnosis delay time

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