All codes
P0730Transmission Issues
Incorrect Gear Ratio - Transmission Slipping
Diagnose P0730 incorrect gear ratio code. Learn what causes transmission gear ratio errors and when repairs are needed.
What you may notice
Symptoms
- 01Transmission slipping
- 02RPM flaring between shifts
- 03Harsh or delayed shifts
- 04Reduced fuel economy
- 05Vehicle may go into limp mode
Where to look first
Common causes
- 01Low or contaminated transmission fluid
- 02Worn clutch packs
- 03Faulty shift solenoids
- 04Torque converter problems
- 05Internal transmission wear
Step by step
What to check and repair
- 01Check transmission fluid level and condition
- 02If fluid is burnt/dark, internal damage likely
- 03Scan for additional codes
- 04May need transmission shop diagnosis
- 05Could require rebuild or replacement
What Does P0730 Mean?
The P0730 code indicates that the TCM has detected a gear ratio error - the transmission is not achieving the expected gear ratio for the commanded gear.
What This Means
In simpler terms, the transmission is slipping. The input and output shaft speeds don't match what they should be for the current gear.
Serious Code
P0730 often indicates internal transmission problems. While it could be something simple like low fluid, it may require transmission rebuild or replacement.