DTC Detection Logic
To judge malfunctions, the diagnosis checks that the A/F signal computed by ECM from the A/F sensor 1 signal fluctuates according to fuel feedback control.
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DTC |
CONSULT screen terms (Trouble diagnosis content) |
DTC detection condition |
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P2239 |
O2 sensor bank 1 sensor 1 (O2 sensor positive current control circuit high bank 1 sensor 1) |
Diagnosis condition |
-- |
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Signal (terminal) |
The A/F signal computed by ECM |
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Threshold |
The output voltage computed by ECM according to the A/F sensor 1 signal is constant. |
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Diagnosis delay time |
-- |
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