What does the error code P-0702 mean on a 2001 Saturn SC1?

Answer 1

Trouble code P0702 means:Transmission control system electrical

The above is a basic readout of what a OBDII scanner would display, Not much information can be drawn from that, just points you blindly at a certain sub system. Inside your transmission, there are transmission solenoids. Each solenoid (TCC, Pressure control, Shift 2, Shift 3 and Shift 4) ground wire is controlled independently by the PCM (engine computer) The PCM also controls the Ignition voltage (positive voltage) to all 5 solenoids whenever the fuel pump relay is turned on... so its controlled by the key being put in the "on" position. Trouble code p0702 is set when the PCM detects low voltage feedback to all 5 solenoids while the engine is running. Feedback voltage should be 1.25 volts on ground, and no more than 9.5 volts on Positive. there are 3 transmission fuses in your under hood fuse box. all labeled starting with TRS. check the fuses. at the top of your transmission, below the battery tray there is a wire connector held in place with a 7mm bolt. make sure the bolt is tight, and that there is no corrosion in the wire connectors. also, check the wires coming out of the connector and follow them back to the main harness. Saturn's have a tendency to have a problem with the trans wire harness rubbing through on the metal brace between the intake and block.