Fault-Code Library · Transmission
P0730: Incorrect gear ratio
The gearbox input and output speeds do not match the gear ratio the controller expected.
Common symptoms
- •Flare between gears
- •Harsh shifts
- •Limp mode
- •Delayed engagement
Likely causes
- •Low or degraded transmission fluid
- •Internal clutch slip
- •Mechatronics or solenoid fault
- •Speed-sensor or adaptation issue
First checks
- •Scan gearbox data and ratio errors
- •Check fluid level and service history using the correct procedure
- •Assess shift behavior cold and hot
Important
Continued driving with actual clutch slip can turn a repairable issue into a gearbox rebuild.
A fault code identifies a detected condition, not a failed part. Confirm manufacturer-specific subcodes and live data.
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