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P0730: Incorrect gear ratio
Stop and checkSystem: Transmission and speed
What P0730 means
The transmission is not in the gear the computer commands. This can point to serious internal wear, so get it checked soon.
Common symptoms
- Slipping or harsh gear shifts
- Loss of power
- Stuck in one gear or reduced power mode
Common causes
- Low, old or burnt transmission fluid
- Faulty shift solenoid
- Worn transmission internals
Can I keep driving?
Stop and check. Avoid driving until it is checked. Driving with this problem can cause serious and expensive damage.
What to do next
- Write down the code and any symptoms you notice.
- Check the simple things first: the fuel cap, loose connectors and fluid levels where they apply.
- Do not just clear the code. If the light comes back, the cause is still there and needs a proper diagnosis.
- Read live data and freeze frame data with an OBD-II scanner app to see what the car was doing when the code was set.
Read P0730 from your own car
DriveHub connects to a $15 to $30 OBD-II adapter, reads the code from your car and explains it in plain English. iPhone and Android.
General information, not a diagnosis. Causes vary by make, model and engine. If you are unsure, have the car inspected.