P0731 2004 Nissan Altima Sedan -

Question

1st gear malfunction, will range sensor fix prblem

Answer 1

Hi there,

This is not a code for the range sensor/switch. This issue can be both electronic or proof there is a internal issue with the transmission.

Possible Cause 
Check the following items.

• Shift solenoid valve A
• Shift solenoid valve B
• Each clutch
• Hydraulic control circuit