⚡ AUTO CODE FIX
🔍
TransmissionCritical⚠️ Professional Recommended

P0731

Gear 1 Incorrect Ratio

First gear is not achieving the correct ratio.

SeverityCritical
CategoryTransmission
Est. Repair Cost$1000–$4000
Code TypePowertrain
DIY RepairProfessional

⚡ Common Causes

⚠️ Symptoms

✅ How to Fix — Step by Step

  • Step 1:Check transmission fluid
  • Step 2:Test shift solenoids
  • Step 3:Transmission inspection
  • Step 4:Rebuild or replace transmission
💡 Pro Tip: First gear ratio faults are often early signs of clutch pack wear — address before complete failure.

Repair Cost Estimate

Full Repair Estimate
$1000–$4000
DIY Possible?
PRO
Severity
Critical

Frequently Asked Questions

What does OBD2 code P0731 mean?+
P0731 stands for Gear 1 Incorrect Ratio. First gear is not achieving the correct ratio.
What causes code P0731?+
Worn first gear clutch pack; Faulty 1-2 shift solenoid; Low fluid; Internal mechanical damage
How do I fix code P0731?+
Check transmission fluid; Test shift solenoids; Transmission inspection; Rebuild or replace transmission
How much does it cost to fix P0731?+
Estimated repair cost for P0731 is $1000–$4000.
Is P0731 DIY-friendly?+
P0731 typically requires professional equipment and a qualified mechanic.

AI Diagnosis

Related Codes

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P0732Gear 2 Incorrect Ratio
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P0715Input/Turbine Speed Sensor Circuit Malfunction
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