DTC Detection Logic
WARNING: This page is about a different car, the 2019 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
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DTC |
CONSULT screen terms (Trouble diagnosis content) |
DTC detection condition |
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P2256 |
A/F SENSOR1 (B2) (O2 sensor negative current control circuit high bank 2 sensor 1) |
A |
Diagnosis condition |
-- |
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Signal (terminal) |
A/F sensor 1 (bank 2) signal |
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Threshold |
The A/F signal computed by ECM from the A/F sensor 1 signal is constantly in a range other than approx. 2.2 V |
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Diagnosis delay time |
-- |
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B |
Diagnosis condition |
-- |
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Signal (terminal) |
A/F sensor 1 (bank 2) signal |
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Threshold |
The A/F signal computed by ECM from the A/F sensor 1 signal is constantly approx. 2.2 V |
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Diagnosis delay time |
-- |
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