Causes and Fixes Toyota P1604 Code: Startability Malfunction

How to fix a Toyota P1604 engine code: Startability Malfunction: Symptoms Engine does not start up, or if the engine starts but then immediately stalls and shuts off. *Check for any other OBDII codes If Engine Does Not Turn Over Check Battery Check Starter If Engine Starts, Then Shuts Down Fuel Pump Check Fuel Pump Relay Fuel Pressure Test Clogged Fuel Filter Old or Low-Quality Fuel Other Possible Causes Dirty Throttle Body MAF Sensor Faulty Engine Control Module (ECM) www.backyardmechanic.org See About Page for Disclaimer.