Fault Code P0731
Code meaning, symptoms, possible causes, part number, and estimated cost.
P0731
Gear 1 Incorrect Ratio
Code P0731 indicates an incorrect gear ratio for 1st gear. The transmission control module has detected that the ratio between the transmission's input and output speed does not match the defined 1st gear ratio.
Part Details
Part Name
Transmission Valve Body
Reference P/N (OEM)
N/A
General part number for this fault code — not necessarily for your specific vehicle
Estimated Cost
₪1,500 - ₪6,000
Engine Location
Inside the transmission
Symptoms
- Vehicle struggles to move from a standstill
- Harsh or incorrect gear shifting
- Transmission enters limp mode
- Check Engine Light on
Possible Causes
- 1Hydraulic system problem (clogged/defective valve body)
- 2Defective 1st gear solenoid
- 3Damaged friction in internal transmission clutches
- 4Defective speed sensors (incorrect reading)
- 5Fault in the Transmission Control Module (TCM)
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