Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
The cost to diagnose the P1604 TOYOTA code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
The P1604 code is stored if the engine does not start or continues to crank without starting for a certain period of time. The P1604 code is also stored if the vehicle has run out of fuel. It is necessary to check whether there was enough fuel in the fuel tank before performing this inspection.
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