DTC Detection Logic

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

P0030

HO2S1 HTR B1

(HO2S heater control circuit bank 1 sensor 1)

Diagnosis condition

Engine running at idle

Signal (terminal)

A/F sensor 1 heater (bank 1) signal

Threshold

Deterioration in A/F sensor 1 heater performance.

(Voltage signal transmitted from A/F sensor 1 heater to ECM is higher/lower than voltage in the normal range.)

Diagnosis delay time

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