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Subaru Legacy 2001 Fault Code P1590 Explanation and Fix Guide

Model: Subaru Legacy Fault Code: P1590 Posted: 2005-07-28 13:46

Does anyone know what the meaning of Diagnostic Trouble Code (DTC) P1590 is for a 2001 Subaru Legacy? My mechanic has reset the code and claims it's resolved with no further action needed. Is this accurate, or does it require a proper repair? P1590 specifically relates to the Neutral Position Switch Circuit High Input issue in the transmission system. While some mechanics may consider it minor, it can affect gear shifting performance and safety. It is recommended to investigate thoroughly rather than simply resetting the code.

Related fault codes

P1590

Comments (2)

Anonymous 2006-12-16 19:29

The P1590 code indicates a high input signal from the Neutral Position Switch Circuit. While this may not immediately cause damage, it can lead to improper gear selection or transmission malfunction. For Subaru vehicles, especially older models like the 2001 Legacy, it's best to consult a dealership technician since their diagnostic tools and experience are specifically calibrated for these systems.

Anonymous 2008-03-31 21:28

In many cases, P159-0 is caused by moisture buildup in the transmission shift selector connector on the right side of the transmission. This issue is fairly common in older Subaru models. A recommended fix includes unplugging the connector, inspecting for corrosion, blowing out both ends with shop air, and applying dielectric grease to prevent future moisture ingress. After this repair, the code typically clears and shifting behavior returns to normal.