Engine and gearbox (P)
P0700: Transmission control system request
The transmission control system has detected a problem and requested the engine control unit to turn on the malfunction indicator light (MIL). This is a general code indicating a transmission issue.
Checked by a licensed car technician · last reviewed 29 September 2026
Symptoms
- Check engine light is on
- Transmission may not shift properly
- Reduced fuel efficiency
Common causes
- Stored transmission fault
- Wiring issue
- Fluid problem
How to check it yourself
- Read transmission module codes
- Check transmission fluid level and condition
- Inspect wiring and connectors for damage
Can I keep driving?
You can drive the car, but have it checked soon to avoid potential transmission damage.
General guidance, not a professional inspection. Confirm faults with measurements before buying parts, and use a qualified mechanic for brakes, steering, fuel leaks, airbags, and other safety-critical work. Terms and disclaimer