DTC Detection Logic

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

P2271

O2 sensor signal bank 1 sensor 2

(O2 sensor signal biased/stuck rich bank 1 sensor 2)

Diagnosis condition

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Signal (terminal)

Heated oxygen sensor 2 (bank 1) signal

Threshold

• The maximum voltage from the sensor does not reach the specified voltage.
• ECM detects the heated oxygen sensor 2 circuit is short to ground.

Diagnosis delay time

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