DTC Detection Logic
WARNING: This page is about a different car, the 2019 Nissan NV3500 HD and 2019 Nissan NV2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
This malfunction is detected when the A/T does not shift into 1GR position as instructed by TCM. This is not only caused by electrical malfunction (circuits open or shorted) but by mechanical malfunction such as control valve sticking, improper solenoid valve operation, intake air leak, etc.
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DTC |
CONSULT screen terms (Trouble diagnosis content) |
DTC detection condition |
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P0731 |
1GR INCORRECT RATIO (Gear 1 Incorrect Ratio) |
Diagnosis condition |
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Signal |
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Threshold |
The gear ratio is:
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Diagnosis delay time |
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