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Nissan Pathfinder 2005 P1815 P1774 P1731 Fault: Transmission Stuttering at 80 km/h - Diagnosis and Repair Costs

Model: Nissan Pathfinder Fault Code: P1731 Posted: 2015-01-16 23:58

Hello, we own a 2005 Nissan Pathfinder with a petrol 4.0L V6 engine, 160,000 km, automatic transmission. Recently, we've noticed noticeable stuttering and rough performance at around 80 km/h. After performing an OBD2 scan, the vehicle returned three diagnostic trouble codes: P1815, P1775, and P1731. Based on these codes, it appears the issue is related to the transmission system. Specifically: - P1731 indicates a malfunction during 1st to 2nd gear shift. - P1774 points to a problem with the LC/B solenoid function. - P1816 suggests a short circuit in the 4WD mode selector signal to ground within the transmission control system. Could this be a wiring issue or faulty solenoids? Are there known common fixes for these codes on the 2005 Nissan Pathfinder, especially with automatic transmissions? We're looking to understand whether this is a major repair and what the typical costs might be. Any insights from owners in Australia would be greatly appreciated. Thanks, Micky — Melbourne, Australia

Related fault codes
P1731P1774P1815
Comments (4)
Anonymous 2015-01-17 11:39

Yes, these codes point to transmission-related issues. For a 2005 Nissan Pathfinder: P1731 = 1st to 2nd gear shift malfunction; P1774 = LC/B solenoid function failure; P1815 = short circuit in the 4WD mode selector signal to ground. The root cause is likely either wiring faults, damaged connectors, or failing solenoids within the transmission control module.

Anonymous 2015-01-17 14:59

Thanks for confirming — we've seen these same codes on our 2005 Pathfinder. Is this a major repair? What kind of work is typically required to fix it?

Anonymous 2015-01-18 09:30

It may not be an extremely expensive repair, but it depends on the exact cause. A thorough inspection of wiring harnesses, connectors, fuses, and ground connections should be performed first. If issues are found, solenoids or control module components may need to be tested and replaced as needed.

Anonymous 2016-01-02 15:18

Where is the location of the torque converter clutch solenoid in a 2005 Nissan Pathfinder with 4WD?