● Fix soon
Usually drivable for a short time, but check it soon. It can get worse.
Usually drivable for a short time, but check it soon. It can get worse.
The transmission computer has stored a fault and asked for the engine light. The driver may notice harsh shifts or a stuck gear.
Guided check
- Is there a second code stored in the gearbox computer?If yes: P0700 only says the gearbox computer found a fault. Read that computer and follow its code.
- Is the gearbox oil low, dark or burnt?If yes: Find any leak and correct the oil using the maker's type and procedure.
- Are the battery and connectors weak or corroded?If yes: Fix these first, clear the code and read the gearbox computer again.
These checks are general and are still being reviewed by working mechanics.
Causes vary by car. Test before you order a part.
Likely causes, most common first
- Stored fault in the transmission computer
- Low or dirty transmission fluid
- Faulty solenoid or speed sensor
- Wiring fault
Parts usually involved
- Transmission fluid Find at suppliers
- Shift solenoids Find at suppliers
- Speed sensors Find at suppliers
Test before you replace
Read the codes in the transmission computer with a suitable scan tool, since this code only points there.
General guidance for generic OBD2 codes. Always follow the maker's procedure for the car in front of you.