DTC P1604: Startability Malfunction [12/2013 - 11/2016]: Description

WARNING: This page is about a different variant/trim than selected.

This DTC is stored when the engine does not start even though the STA signal is input or when the engine takes a long time to start, and when the engine speed is low or the engine stalls just after the engine starts.

Using the Techstream, the conditions present when the DTC was stored can be confirmed by referring to the freeze frame data. Freeze frame data records engine conditions when a malfunction occurs. This information can be useful when troubleshooting.

It is necessary to check if the vehicle ran out of fuel before performing troubleshooting, as this DTC is also stored when there is engine starting trouble due to running out of fuel.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory
P1604	Startability Malfunction	Either of the following conditions is met: The engine speed is below 500 rpm with the STA signal on for a certain amount of time (refer to the illustration below) (1 trip detection logic). After the engine starts (engine speed is 500 rpm or more), the engine speed drops to 200 rpm or less within approximately 2 seconds (1 trip detection logic).	Engine assembly (excess friction, compression loss) Starter assembly Crankshaft position sensor Camshaft position sensor Engine coolant temperature sensor Fuel pump Fuel pump control system Fuel line (fuel filter, pipes and hoses) Fuel injector assembly Throttle body with motor assembly Fuel pressure regulator Battery Drive plate and ring gear sub-assembly Spark plug Ignition coil assembly circuit Intake system Camshaft timing oil control valve assembly Mass air flow meter sub-assembly Air fuel ratio sensor Valve timing Fuel Purge VSV Intake valve Immobilizer system ECM	Does not come on	DTC stored

Fig 1: Starting Time VS Engine Coolant Temperature Graph