P1777 — CVT Step Motor Circuit Malfunction
CAUTIONIs it safe to drive? Drive gently and get it looked at soon — it can worsen or fail inspection.
What P1777 means
This is a manufacturer-specific code — its meaning depends on the vehicle’s make (see below).
What P1777 means on specific makes
Nissan / Infiniti CAUTION
Electrical circuit fault in the CVT step motor, which controls the variator pulley ratio. A CVT-specific Nissan code; can cause poor ratio control, slipping feel, or limp mode.
- Failed CVT step motor / valve body ($300-1000+)
- Connector/wiring fault
- Degraded CVT fluid
Check first: Scan the step motor circuit and check CVT fluid; step-motor faults often mean valve-body/control work. P1778 is the mechanical version.
Source: troublecodes.net/nissancodes