P0731
Gear 1 Incorrect Ratio
System: Transmission
Severity: medium
What does P0731 mean?
The DTC P0731 (Gear 1 Incorrect Ratio) is a fault code stored by the ECU when it detects a gear 1 ratio condition in the transmission subsystem. It is commonly seen on European and Asian vehicles using Bosch, Continental, Siemens or Denso ECUs.
Common causes of P0731
- Failed clutch pack
- Stuck shift solenoid
- Low ATF pressure
- Worn planetary gear
How to fix P0731
Trans rebuild often required. DaVinci can adjust shift logic but not fix mechanical wear.
Tuning approach with DaVinci Deluxe · Cloud Edition
For P0731, DaVinci Deluxe · Cloud Edition offers the following ECU map adjustments and software solutions:
- Shift pressure adjust
- Lockup tune
Need to fix P0731 on your ECU?
DaVinci Deluxe · Cloud Edition is professional ECU tuning software trusted by 800+ workshops. 24-Hour Pass €45.99, 10 minutes free trial.
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