DTC Detection Logic

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

P0057

HO2S2 HTR (B2)

(HO2S heater control circuit low bank 2 sensor 2)

Diagnosis condition

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Signal (terminal)

Heated oxygen sensor 2 heater (bank 2) signal

Threshold

• The current amperage in the heated oxygen sensor 2 heater circuit is out of the normal range.

  (An excessively low voltage signal is sent to ECM through the heated oxygen sensor 2 heater.)

• ECM detects the heated oxygen sensor 2 heater circuit is short to ground.

Diagnosis delay time

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