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P0731 Gear 1 shift incorrect ratio

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Gear 1 shift incorrect ratio, readable through chat.

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System
Transmission
Component
Valve body

Symptoms

  • Transmission warning light on, sometimes with a message
  • Late or harsh engagement from a stop
  • Engine revs rising without matching road speed
  • Transmission limiting itself to certain gears or holding one gear

Common causes

  • Low or degraded fluid, or a leak
  • Transmission control module software not current
  • Valve body (sticking valves or solenoids)
  • Worn or damaged clutch
  • Speed sensor wiring or connector fault
  • Faulty transmission control module

Guides for this code

Pencil sketch of a Jeep Cherokee in a garage
Diagnostics & Repair

P0731 on a 2014-2018 Jeep Cherokee: Gear 1 Ratio Causes and Repair

JC Landry · Oct 30, 2026

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Answers come from the factory manual for your make, model and year, with the page cited. Join the waitlist and we will email you when a spot opens up.