P0731 on Dodge
Gear 1 Incorrect Ratio
P0731 on Dodge vehicles indicates gear 1 incorrect ratio. Au7o has documented this code across 1 Dodge model — most commonly on Neon. 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 Dodge range from $1,200 to $2,600, 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 Dodge by Model
Dodge Neon(1 issue)
- 3-speed TorqueFlite automatic (31TH/A413) durability problems1995-1999
First-gen Neons with the optional 3-speed automatic (a TorqueFlite-family 31TH/A413 unit) are markedly less durable than the 5-speed manual. Documented failure points include a sticking governor valve (causes high-gear starts/binding), sprag/one-way-clutch failure, and clutch/band failures leading to slipping, harsh or missed shifts, dropping out of gear, and no-reverse conditions. Fluid neglect and the Neon's cooling/heat issues accelerate wear.
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View P0731 across all makes →Frequently Asked Questions
What does P0731 mean on Dodge?▼
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 Dodge specifically, this code is documented across 1 model.
What causes P0731 on Dodge vehicles?▼
Common causes on Dodge: 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 Dodge?▼
Repair costs on Dodge range from $1,200 to $2,600, depending on the specific model and root cause.
Which Dodge models have P0731 documented?▼
Au7o has documented P0731 on 1 Dodge model: Neon.