P0702Transmission Control System Electrical
- Generic OBD-II code · Powertrain
- Can trigger limp mode
- How the car detects it
- P0702 reports an electrical fault in the transmission control system as a whole – typically the supply of the transmission actuators (solenoid supply, transmission relay, supply switch in the module) or a circuit fault not assigned to a single component. No manufacturer document available to us describes it in detail; Ford's engine module list for 6.8 L E- and F-Series trucks stores it without the check engine light. If the solenoid supply is lost, transmissions usually fall back to a hydraulic limp gear. Individual solenoids have their own codes (P0750 ff); actuator supply is P0657 ff.
- What you may notice
- Transmission limp mode with fixed gear
- Transmission warning; check engine light depending on the maker
- No or harsh shifts, further solenoid codes
- Likely causes
- LikelyTransmission actuator supply interrupted (fuse, relay, ground)
- PossibleHarness or connector at transmission or module damaged, corroded or oil-soaked
- PossibleTransmission module output stage or supply switch faulty
- RareLow or fluctuating system voltage
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.