DTC P1603: Engine Stall History; DTC P1605: Rough Idling [12/2015 - 08/2016]: Description

WARNING: This page is about a different car, the 2016 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.

P1603

After starting the engine, this DTC is stored when the engine stops without the ignition switch being operated.

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 has run out of fuel before performing troubleshooting, as this DTC is also stored when the engine stalls due to running out of fuel.

DTC No.	DTC Detection Condition	Trouble Area
P1603	After monitoring for startability problems (P1604) finishes and 5 seconds or more elapse after starting the engine, with the engine running, the engine stops (the engine speed drops to 200 rpm or less) without the ignition switch being operated for 0.5 seconds or more (1 trip detection logic).	Air leak in intake system Purge VSV Brake booster assembly Mass air flow meter Engine coolant temperature sensor Thermostat Power supply circuit (purge VSV, air fuel ratio sensor, fuel injector assembly, ignition coil assembly) Fuel pump Fuel pump control circuit Fuel line PCV valve and hose Camshaft timing oil control valve assembly (for intake side of bank 1, 2) Camshaft timing oil control valve assembly (for exhaust side of bank 1, 2) Knock sensor Ignition system Air conditioning system Power steering system Electrical load signal system Charging system A/T system Park/neutral position switch ECM Wire harness or connector Engine immobilizer system

P1605

This DTC is stored if the engine speed drops below the set speed without the ignition switch being operated.

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

DTC No.	DTC Detection Condition	Trouble Area
P1605	After 5 seconds or more elapse after starting the engine, with the engine running, the engine speed drops to 400 rpm or less without the ignition switch being operated (1 trip detection logic).	Air leak in intake system Purge VSV Brake booster assembly Mass air flow meter Engine coolant temperature sensor Thermostat Power supply circuit (purge VSV, air fuel ratio sensor, fuel injector assembly, ignition coil assembly) Fuel pump Fuel pump control circuit Fuel line PCV valve and hose Camshaft timing oil control valve assembly (for intake side of bank 1, 2) Camshaft timing oil control valve assembly (for exhaust side of bank 1, 2) Knock sensor Ignition system Air conditioning system Power steering system Electrical load signal system Charging system A/T system Park/neutral position switch ECM Wire harness or connector

Reference values when there is an air leak in the intake system during rough idling

FREEZE FRAME DATA P1605 ROUGH IDLING

Parameter	-3	-2	-1	0	1	Unit
Engine Speed	694	693	412	384	114	rpm
Calculate Load	31.7	31.7	34.5	35.6	92.5	%
Vehicle Load	13.3	13.7	27.4	29.4	22.3	%
MAF	3.75	3.79	4.53	4.46	1.01	gm/sec
Atmosphere Pressure	-1	-1	-1	-1	-1	psi (gauge)
Coolant Temp	181	181	181	181	181	F
Intake Air	111	111	111	111	111	F
Battery Voltage	13.085	13.085	12.753	12.753	12.675	V
Throttle Sensor Volt %	14.9	14.9	16.0	16.0	17.2	%
Throttl Sensor #2 Volt %	47.0	47.0	48.2	48.2	49.8	%
Throttle Sensor Position	0.0	0.0	0.0	0.0	0.0	%
Throttle Motor DUTY	14.9	14.9	16.0	16.0	17.2	%
Injector (Port)	2382	2379	2649	2649	2975	μs
Injection Volum (Cylinder 1)	0.112	0.112	0.112	0.112	0.112	ml
Fuel Pump/Speed Status	ON	ON	ON	ON	ON
EVAP (Purge) VSV	0.0	0.0	0.0	0.0	0.0	%
Evap Purge Flow	0.0	0.0	0.0	0.0	0.0	%
Purge Density Learn Value	0.000	0.000	0.000	0.000	0.000
EVAP System Vent Valve	OFF	OFF	OFF	OFF	OFF
EVAP Purge VSV	OFF	OFF	OFF	OFF	OFF
Purge Cut VSV Duty	0.0	0.0	0.0	0.0	0.0	%
Target Air-Fuel Ratio	0.998	0.998	0.998	0.998	0.998
AF Lambda B1S1	0.994	0.988	0.997	0.998	1.049
AF Lambda B2S1	0.996	0.988	0.997	0.998	1.049
AFS Voltage B1S1	3.219	3.185	3.244	3.254	3.517	V
AFS Voltage B2S1	3.224	3.180	3.239	3.239	3.512	V
O2S B1S2	0.000	0.000	0.000	0.000	0.000	V
O2S B2S2	0.000	0.000	0.000	0.000	0.000	V
Short FT #1	9.375	9.375	7.031	7.031	0.000	%
Long FT #1	0.000	0.000	0.000	0.000	0.000	%
Total FT #1	0.000	0.000	0.000	0.000	0.000
Sort FT #2	9.375	8.593	7.031	7.031	0.000	%
Long FT #2	0.781	0.781	0.781	0.781	0.781	%
Total FT #2	0.000	0.000	0.000	0.000	0.000
Fuel System Status #1	CL	CL	CL	CL	CL
Fuel System Status #2	CL	CL	CL	CL	CL
IGN Advance	14.5	15.5	18.0	18.0	18.0	deg
Knock Feedback Value	-3.0	-3.0	-3.0	-3.0	-3.0	deg(CA)
Knock Correct Learn Value	23.1	23.1	23.1	23.1	23.1	deg(CA)
Starter Signal	OFF	OFF	OFF	OFF	OFF