What Does Code P001E Mean P001E Auto Trouble Code on vehicles with electronically controlled automatic transmissions, the 3-4 shift solenoid is responsible for actuating the hydraulic circuits to activate clutches or bands that change gears inside the automatic transmission. engine code P001EP001E fixobd P001Edtc P001Eobd code P001Eobd2 P001EP001E car codediagnostic code P001Ecar code P001Echeck engine code P001Efehlercode P001EP001E fiatcodigo P001Ecodigo falla P001EP001E kody błędówcodigo de falla P001EPossible symptoms Engine Light ON (or Service Engine Soon Warning Light) P001E OBDII Repair : With P001E code so start with the basics like a fuel pressure and fuel volume test. Or, you can start on the electrical side by doing a voltage drop on both the power and ground connections for the fuel pump. Some shops are reporting corrosion on the fuel pump ground that reduces power and fuel pressure. Excessive air inflow can be caused by a vacuum leak, a dirty sensor or, an exhaust gas recirculation valve not closing properly. If the problem is not enough fuel, the culprit may be dirty injectors or fuel filters, a weak fuel pump or a leaky fuel pressure regulator. The lean fuel mix error may be accompanied by rough idling, engine misfires, hesitation during acceleration and overall poor engine performance.