P1777 fault code: what it means

P1777: CVT stepper motor circuit fault. Ratio control is affected: may stick in one ratio or rev high.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

stepper motor
wiring fault
TCM

P1777 by make

Mitsubishi

CVT stepper motor circuit fault. Ratio control is affected: may stick in one ratio or rev high.

Usual causes: stepper motor; wiring fault; TCM

Nissan

CVT step motor circuit fault. The step motor sets the pulley ratio, so the CVT may stick in one ratio, rev high or feel sluggish.

Usual causes: step motor (on the valve body); wiring or connector fault; TCM fault

What the repair usually costs

CVT valve body replacement (remanufactured, in car)NZ$1,280–NZ$2,420 · A$1,200–A$2,400

Not sure what P1777 means on your car? Ask Credov.

Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.