Transmission control system malfunction indicator request
The powertrain controller received a request from the transmission controller to illuminate the malfunction indicator lamp because the transmission system stored a qualifying fault.
Conditions that can produce P0700
These are diagnostic branches, not a ranked parts list. Prevalence and testing order depend on the exact vehicle and failure scene.
- Transmission-controller fault stored
- Power, ground, voltage, or network interruption
- Sensor, solenoid, pressure, temperature, or ratio problem
- Fluid, mechanical, or hydraulic condition
- Programming, adaptation, or module issue
What to inspect next
- Stop for slipping, loss of drive, severe shift, overheating, leakage, or unsafe behavior
- Scan the transmission controller with exact supported access
- Preserve its codes, status, event data, fluid temperature, and commanded/actual state
- Use the exact fluid and pressure/mechanical procedure
Evidence that strengthens the answer
Verify the repair
Preserve the pre-repair record, document exactly what changed, then repeat the relevant operating condition safely. Confirm no current or pending fault returns, review permanent-code and readiness state where applicable, and state which tests or modules remained unavailable.
This page explains a commonly standardized code at a general level. Confirm the exact definition, module, status, test conditions, thresholds, wiring, and service process for the vehicle application using current official information.