P0731 on Lincoln
Gear 1 Incorrect Ratio
P0731 on Lincoln vehicles indicates gear 1 incorrect ratio. Au7o has documented this code across 1 Lincoln model — most commonly on Aviator. This code means the Transmission/Powertrain Control Module detected an incorrect gear ratio in 1st gear. The module compares input (engine/turbine) speed to output shaft speed; when the car is commanded into 1st but the calculated ratio doesn't match the expected value, P0731 sets. This points to slipping, an incorrect shift, or a hydraulic/mechanical problem rather than just an electrical fault. You may feel slipping, harsh or delayed engagement, or the transmission may go into a limited 'limp' mode. Typical repair costs on Lincoln range from $800 to $7,000, depending on the specific model and root cause.
Common Causes of P0731
- •Low or degraded/burnt transmission fluid
- •Slipping clutch packs or worn friction components
- •Stuck or faulty shift solenoid affecting 1st gear
- •Internal hydraulic leak / valve body fault
- •Worn or failing torque converter
- •Faulty input or output speed sensor
- •Mechanical wear (planetary gears, bands) inside the transmission
P0731 on Lincoln by Model
Lincoln Aviator(1 issue)
- 10R60/10R80 MHT Harsh/Delayed Shifts from Sticking Valve Body and CDF Clutch Sleeve Movement2020-2023
Many 2020-2023 Aviators with the 10R60 10-speed automatic (3.0L EcoBoost) and 10R80 MHT (Grand Touring PHEV) exhibit harsh 1-2/2-3 upshifts, clunky engagements into Drive or Reverse, and delayed shifts, with or without illuminated MIL. Root cause per Ford TSB 23-2250 is software/solenoid ID strategy, sticking valves in the main control valve body, and/or axial movement of the CDF clutch cylinder sleeve. Ford issued multiple TSBs (21-2316, 22-2102, 22-2428, 23-2250, 24-2046) and a related 10R80 class action is active in 2025 for sibling Ford/Lincoln models.
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What does P0731 mean on Lincoln?▼
P0731 stands for "Gear 1 Incorrect Ratio." This code means the Transmission/Powertrain Control Module detected an incorrect gear ratio in 1st gear. The module compares input (engine/turbine) speed to output shaft speed; when the car is commanded into 1st but the calculated ratio doesn't match the expected value, P0731 sets. This points to slipping, an incorrect shift, or a hydraulic/mechanical problem rather than just an electrical fault. You may feel slipping, harsh or delayed engagement, or the transmission may go into a limited 'limp' mode. On Lincoln specifically, this code is documented across 1 model.
What causes P0731 on Lincoln vehicles?▼
Common causes on Lincoln: Low or degraded/burnt transmission fluid, Slipping clutch packs or worn friction components, Stuck or faulty shift solenoid affecting 1st gear, Internal hydraulic leak / valve body fault, Worn or failing torque converter. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0731 on a Lincoln?▼
Repair costs on Lincoln range from $800 to $7,000, depending on the specific model and root cause.
Which Lincoln models have P0731 documented?▼
Au7o has documented P0731 on 1 Lincoln model: Aviator.