P1815 infiniti g35. What does the OBDII code P1815 mean for an Infiniti vehicle? P1815 indicates an issue with the Manual Mode Switch circuit, which is part of the transmission system in vehicles equipped with a manual shift mode. Check the CAN bus wiring harness for damage or loose connections. What are the possible causes of OBDII code P1815 in a 2006 Infiniti G35? Possible causes include a faulty manual mode switch, damaged wiring or connectors related to the switch, or a problem with the transmission control module. Code P1815 2006 INFINITI G35 stands for Manual Mode Switch. Jan 8, 2026 · Troubled by the P1815 code? Discover quick fixes to resolve this error and prevent further transmission issues—read on to ensure a smooth ride. What causes manual mode shifting issues in a 2005 G35 Sedan and how to fix them? Learn what Manual Mode Switch means, location and how to repair. Read the article to know possible causes, symptoms, and descriptions. . The U1000 code indicates a communication fault in the CAN bus network, while P1815 relates to transmission range sensor problems. aoi pio vrx hec eyc hny crc llb fnb xpa dpb bqf sez bgt crh