2004 Honda Civic Hybrid P0700 Code: D Light Flashing, Transmission Won't Shift Out of First Gear
My 2004 Honda Civic Hybrid is displaying a flashing D (Drive) light and the check engine light. When I shift into gear, the vehicle moves and accelerates but fails to shift out of first gear. The onboard computer returned codes P0700 and P0722 initially. After researching forums, I suspected a faulty output speed sensor. I replaced it, but the issue persists. Currently, only code P0700 is present. What could be causing this? Any troubleshooting steps or diagnostic advice for this specific model?
P0700 is a generic transmission fault code indicating an issue within the transmission system. P0722 specifically points to a 'no signal' from the output speed sensor circuit. The term 'circuit' is critical — ensure the electrical connection and wiring are intact. Did you install a dealer-grade or aftermarket sensor?