P0702 code meaning
Transmission Control System Electrical
What P0702 means
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.
P0702 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0702
- Transmission limp mode with fixed gear
- Transmission warning; check engine light depending on the maker
- No or harsh shifts, further solenoid codes
Common causes of P0702
- Most 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
- Less likelyLow or fluctuating system voltage
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Transmission control moduleTransmission solenoid supplyTransmission wiring
What each part of P0702 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 7 | Area: transmission. |
| 02 | The exact fault in that area. |
What to do next
- Note P0702 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0702
What does P0702 mean?
P0702 means "Transmission Control System Electrical". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P0702?
Drive gently and only to a workshop. With P0702 the car can go into limp mode (reduced power) to protect itself.
Will P0702 fail an emissions test?
P0702 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P0702 to fix?
Difficulty: medium. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P0702 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.