P0700 Code: Transmission Control System Malfunction
🟠 Moderate severity · drivable
Drivable, but there is an underlying transmission fault. Get the full transmission codes read with a capable scanner.
What P0700 means
The transmission control module (TCM) has detected a problem and asked the engine computer to turn on the check engine light. P0700 is a generic flag — the specific transmission fault is stored as a separate code that a basic OBD2 reader often can't see.
Symptoms
- Check engine light is on
- Transmission shifting poorly or slipping
- Vehicle stuck in limp mode
- Harsh or delayed shifts
Common causes
- most common: Underlying transmission fault (solenoid, sensor, or internal)
- common: Low or dirty transmission fluid
- less common: Faulty transmission control module
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Check and top up the transmission fluid level and condition | Yes | $20–60 |
| Have the specific transmission codes read with a capable scanner | Mechanic | $50–150 |
| Repair the underlying transmission fault identified by the codes | Mechanic | $200–2000 |
Frequently asked questions
Can I drive with a P0700 code?
Yes, but there's a real transmission problem behind it. Drive gently and get the specific codes read soon to avoid bigger damage.
Is P0700 the actual transmission problem?
No — P0700 is a generic flag. The real fault is a separate code (often P07xx or P27xx) that needs a transmission-capable scanner to read.
How much does it cost to fix a P0700?
It varies widely: $50–$150 just to diagnose, then anywhere from a fluid change to a $2,000 repair depending on the underlying fault.
Related codes
P0705
P0705 Code: Transmission Range Sensor Circuit Malfunction (PRNDL Input)
P0740P0740 Code: Torque Converter Clutch Circuit Malfunction
P0715P0715 Code: Input/Turbine Speed Sensor Circuit Malfunction
P0700 by vehicle brand
Causes and repair costs for P0700 differ between makes. Pick your brand for the specifics.
Toyota
P0700 on a Toyota
HondaP0700 on a Honda
FordP0700 on a Ford
ChevyP0700 on a Chevy
NissanP0700 on a Nissan
BMWP0700 on a BMW
Mercedes-BenzP0700 on a Mercedes-Benz
VolkswagenP0700 on a Volkswagen
HyundaiP0700 on a Hyundai
SubaruP0700 on a Subaru
MazdaP0700 on a Mazda
JeepP0700 on a Jeep
GMCP0700 on a GMC
LexusP0700 on a Lexus
VolvoP0700 on a Volvo
Related guide: The 10 Most Common Check Engine Codes →
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.