Problem Symptoms Table [10/2017 - ]

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2024 Lexus IS 300, 2023 Lexus IS 300, 2022 Lexus IS 300, 2021 Lexus IS 300, and 2020 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

SFI SYSTEM

Symptom	Suspected Area	Link
Engine does not crank (Does not start)	Battery	Refer to PROCEDURE - Step 1
	ST NO. 1 relay	Refer to PROCEDURE - Step 1
	Starter assembly	Refer to INSPECTION [08/2015 - ]
	Starter signal circuit	Refer to Starter Signal Circuit [08/2015 - ]
	Smart access system with push-button start (for start function)	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 11/2021] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - 09/2022] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2022 - ]
	VC output circuit (ECM 5 V output)	Refer to VC Output Circuit [08/2015 - 09/2020] , or refer to VC Output Circuit [09/2020 - ]
	Park/neutral position switch assembly	Refer to ON-VEHICLE INSPECTION [04/2013 - ]
No initial combustion (Does not start)	Immobilizer system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2017 - 11/2021] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - 09/2022] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2022 - ]
	ECM power source circuit	Refer to ECM Power Source Circuit [08/2015 - ]
	VC output circuit (ECM 5 V output)	Refer to VC Output Circuit [08/2015 - 09/2020] , or refer to VC Output Circuit [09/2020 - ]
	Ignition system	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	Fuel pump control circuit	Refer to Fuel Pump Control Circuit [08/2015 - ]
	Port fuel injector assembly	Refer to INSPECTION [08/2015 - ]
	Direct fuel injector assembly	Refer to INSPECTION [08/2015 - ]
	Crankshaft position sensor	Refer to DTC P0335-11: Crankshaft Position Sensor "A" Circuit Short to Ground; DTC P0335-15: Crankshaft Position Sensor "A" Circuit Short to Battery or Open; DTC P0335-1F: Crankshaft Position Sensor "A" Circuit Intermittent; DTC P0335-2A: Crankshaft Position Sensor "A" Signal Stuck in Range; DTC P0335-31: Crankshaft Position Sensor "A" No Signal [08/2015 - 09/2018] , or refer to DTC P0335-11: Crankshaft Position Sensor "A" Circuit Short to Ground; DTC P0335-15: Crankshaft Position Sensor "A" Circuit Short to Battery or Open; DTC P0335-1F: Crankshaft Position Sensor "A" Circuit Intermittent; DTC P0335-2A: Crankshaft Position Sensor "A" Signal Stuck in Range; DTC P0335-31: Crankshaft Position Sensor "A" No Signal [09/2018 - 09/2022] , or refer to DTC P0335-11: Crankshaft Position Sensor "A" Circuit Short to Ground; DTC P0335-15: Crankshaft Position Sensor "A" Circuit Short to Battery or Open; DTC P0335-1F: Crankshaft Position Sensor "A" Circuit Intermittent; DTC P0335-2A: Crankshaft Position Sensor "A" Signal Stuck in Range; DTC P0335-31: Crankshaft Position Sensor "A" No Signal [09/2022 - ]
	Intake system	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	Valve timing	Refer to PROCEDURE - Step 6 [08/2015 - 09/2022] , or refer to PROCEDURE - Step 6 [09/2022 - ]
	No. 1 valve rocker arm sub-assembly*	Refer to COMPONENTS [08/2015 - ]
Engine cranks normally but difficult to start	ECM power source circuit	Refer to ECM Power Source Circuit [08/2015 - ]
	Flow chart [Engine difficult to start]	Refer to Engine Difficult to Start [08/2015 - 09/2018] , or refer to Engine Difficult to Start [09/2018 - 09/2019] , or refer to Engine Difficult to Start [09/2019 - 09/2022] , or refer to Engine Difficult to Start [09/2022 - ]
	Throttle body with motor assembly	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	Fuel pump assembly (for high pressure side)	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	Fuel pump (for low pressure side)	Refer to INSPECTION [08/2015 - ]
	Engine coolant temperature sensor	Refer to INSPECTION [08/2015 - ]
	Fuel pump control circuit	Refer to Fuel Pump Control Circuit [08/2015 - ]
	Ignition system	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	Spark plug	Refer to PROCEDURE - Step 3
	Compression	Refer to PROCEDURE - Step 10 [08/2015 - 09/2020] , or refer to PROCEDURE - Step 10 [09/2020 - ]
	Port fuel injector assembly	Refer to INSPECTION [08/2015 - ]
	Direct fuel injector assembly	Refer to INSPECTION [08/2015 - ]
	Crankshaft position sensor	Refer to DTC P0335-11: Crankshaft Position Sensor "A" Circuit Short to Ground; DTC P0335-15: Crankshaft Position Sensor "A" Circuit Short to Battery or Open; DTC P0335-1F: Crankshaft Position Sensor "A" Circuit Intermittent; DTC P0335-2A: Crankshaft Position Sensor "A" Signal Stuck in Range; DTC P0335-31: Crankshaft Position Sensor "A" No Signal [08/2015 - 09/2018] , or refer to DTC P0335-11: Crankshaft Position Sensor "A" Circuit Short to Ground; DTC P0335-15: Crankshaft Position Sensor "A" Circuit Short to Battery or Open; DTC P0335-1F: Crankshaft Position Sensor "A" Circuit Intermittent; DTC P0335-2A: Crankshaft Position Sensor "A" Signal Stuck in Range; DTC P0335-31: Crankshaft Position Sensor "A" No Signal [09/2018 - 09/2022] , or refer to DTC P0335-11: Crankshaft Position Sensor "A" Circuit Short to Ground; DTC P0335-15: Crankshaft Position Sensor "A" Circuit Short to Battery or Open; DTC P0335-1F: Crankshaft Position Sensor "A" Circuit Intermittent; DTC P0335-2A: Crankshaft Position Sensor "A" Signal Stuck in Range; DTC P0335-31: Crankshaft Position Sensor "A" No Signal [09/2022 - ]
	Intake system	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	Valve timing	Refer to PROCEDURE - Step 6 [08/2015 - 09/2022] , or refer to PROCEDURE - Step 6 [09/2022 - ]
	No. 1 valve rocker arm sub-assembly*	Refer to COMPONENTS [08/2015 - ]
Incomplete intermittent combustion occurs (Does not start)	Fuel pump control circuit	Refer to Fuel Pump Control Circuit [08/2015 - ]
	Ignition system	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	Port fuel injector assembly	Refer to INSPECTION [08/2015 - ]
	Direct fuel injector assembly	Refer to INSPECTION [08/2015 - ]
	Crankshaft position sensor	Refer to DTC P0335-11: Crankshaft Position Sensor "A" Circuit Short to Ground; DTC P0335-15: Crankshaft Position Sensor "A" Circuit Short to Battery or Open; DTC P0335-1F: Crankshaft Position Sensor "A" Circuit Intermittent; DTC P0335-2A: Crankshaft Position Sensor "A" Signal Stuck in Range; DTC P0335-31: Crankshaft Position Sensor "A" No Signal [08/2015 - 09/2018] , or refer to DTC P0335-11: Crankshaft Position Sensor "A" Circuit Short to Ground; DTC P0335-15: Crankshaft Position Sensor "A" Circuit Short to Battery or Open; DTC P0335-1F: Crankshaft Position Sensor "A" Circuit Intermittent; DTC P0335-2A: Crankshaft Position Sensor "A" Signal Stuck in Range; DTC P0335-31: Crankshaft Position Sensor "A" No Signal [09/2018 - 09/2022] , or refer to DTC P0335-11: Crankshaft Position Sensor "A" Circuit Short to Ground; DTC P0335-15: Crankshaft Position Sensor "A" Circuit Short to Battery or Open; DTC P0335-1F: Crankshaft Position Sensor "A" Circuit Intermittent; DTC P0335-2A: Crankshaft Position Sensor "A" Signal Stuck in Range; DTC P0335-31: Crankshaft Position Sensor "A" No Signal [09/2022 - ]
	Intake system	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	Valve timing	Refer to PROCEDURE - Step 6 [08/2015 - 09/2022] , or refer to PROCEDURE - Step 6 [09/2022 - ]
High engine speed	Throttle body with motor assembly	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	ECM power source circuit	Refer to ECM Power Source Circuit [08/2015 - ]
	PCV hose	Refer to PROCEDURE - Step 13 [08/2015 - 09/2018] , or refer to PROCEDURE - Step 13 [09/2018 - 09/2022] , or refer to PROCEDURE - Step 13 [09/2022 - ]
	PCV system	Refer to ON-VEHICLE INSPECTION [08/2015 - 09/2020] , or refer to ON-VEHICLE INSPECTION [09/2020 - ]
Low engine speed (Poor idle)	Fuel pump control circuit	Refer to Fuel Pump Control Circuit [08/2015 - ]
	Throttle body with motor assembly	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	Port fuel injector assembly	Refer to INSPECTION [08/2015 - ]
	Direct fuel injector assembly	Refer to INSPECTION [08/2015 - ]
	Fuel pump assembly (for high pressure side)	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	PCV hose	Refer to PROCEDURE - Step 13 [08/2015 - 09/2018] , or refer to PROCEDURE - Step 13 [09/2018 - 09/2022] , or refer to PROCEDURE - Step 13 [09/2022 - ]
	PCV system	Refer to ON-VEHICLE INSPECTION [08/2015 - 09/2020] , or refer to ON-VEHICLE INSPECTION [09/2020 - ]
	Intake system	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	No. 2 turbo pressure sensor	Refer to PROCEDURE - Step 1
	Electric water pump assembly	Refer to PROCEDURE - Step 2 [08/2015 - 09/2022] , or refer to PROCEDURE - Step 2 [09/2022 - ]
Rough idle	Flow chart [Rough idling]	Refer to Rough Idling [08/2015 - 09/2018] , or refer to Rough Idling [09/2018 - 09/2019] , or refer to Rough Idling [09/2019 - ]
	Throttle body with motor assembly	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	Port fuel injector assembly	Refer to INSPECTION [08/2015 - ]
	Direct fuel injector assembly	Refer to INSPECTION [08/2015 - ]
	Fuel pump assembly (for high pressure side)	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	Ignition system	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	Compression	Refer to PROCEDURE - Step 10 [08/2015 - 09/2020] , or refer to PROCEDURE - Step 10 [09/2020 - ]
	Fuel pump control circuit	Refer to Fuel Pump Control Circuit [08/2015 - ]
	Spark plug	Refer to PROCEDURE - Step 3
	Intake system	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	Valve timing	Refer to PROCEDURE - Step 6 [08/2015 - 09/2022] , or refer to PROCEDURE - Step 6 [09/2022 - ]
	No. 1 valve rocker arm sub-assembly*	Refer to COMPONENTS [08/2015 - ]
	No. 2 turbo pressure sensor	Refer to PROCEDURE - Step 1
	Electric water pump assembly	Refer to PROCEDURE - Step 2 [08/2015 - 09/2022] , or refer to PROCEDURE - Step 2 [09/2022 - ]
Hunting (Poor idle)	Throttle body with motor assembly	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	ECM power source circuit	Refer to ECM Power Source Circuit [08/2015 - ]
	Fuel pump control circuit	Refer to Fuel Pump Control Circuit [08/2015 - ]
	Spark plug	Refer to PROCEDURE - Step 3
	Intake system	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	Electric water pump assembly	Refer to PROCEDURE - Step 2 [08/2015 - 09/2022] , or refer to PROCEDURE - Step 2 [09/2022 - ]
	Drive start control	Refer to Drive Start Control [10/2017 - 09/2019] , or refer to Drive Start Control [09/2019 - 09/2020] , or refer to Drive Start Control [09/2020 - ]
Hesitation/Poor acceleration (Poor driveability)	Port fuel injector assembly	Refer to INSPECTION [08/2015 - ]
	Direct fuel injector assembly	Refer to INSPECTION [08/2015 - ]
	Fuel pump control circuit	Refer to Fuel Pump Control Circuit [08/2015 - ]
	Fuel pump assembly (for high pressure side)	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	Ignition system	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	Spark plug	Refer to PROCEDURE - Step 3
	Intake system	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	Valve timing	Refer to PROCEDURE - Step 6 [08/2015 - 09/2022] , or refer to PROCEDURE - Step 6 [09/2022 - ]
	No. 2 turbo pressure sensor	Refer to PROCEDURE - Step 1
	Vacuum regulating valve assembly	Refer to INSPECTION [08/2015 - ]
	Waste gate valve	Refer to INSPECTION [08/2015 - ]
	Waste gate valve actuator with bracket assembly	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	Air by-pass valve assembly	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	Compressor housing with bearing sub-assembly	Refer to INSPECTION [08/2015 - ]
	Electric water pump assembly	Refer to PROCEDURE - Step 2 [08/2015 - 09/2022] , or refer to PROCEDURE - Step 2 [09/2022 - ]
	No. 1 valve rocker arm sub-assembly*	Refer to COMPONENTS [08/2015 - ]
	Brake override system	Refer to Brake Override System [08/2015 - 09/2019] , or refer to Brake Override System [09/2019 - 09/2020] , or refer to Brake Override System [09/2020 - ]
	Drive start control	Refer to Drive Start Control [10/2017 - 09/2019] , or refer to Drive Start Control [09/2019 - 09/2020] , or refer to Drive Start Control [09/2020 - ]
Lack of power	Flow chart [Lack of power]	Refer to Lack of Power [08/2015 - 09/2018] , or refer to Lack of Power [09/2018 - 09/2019] , or refer to Lack of Power [09/2019 - 09/2022] , or refer to Lack of Power [09/2022 - ]
	Vacuum regulating valve assembly	Refer to INSPECTION [08/2015 - ]
	Waste gate valve	Refer to INSPECTION [08/2015 - ]
	Waste gate valve actuator with bracket assembly	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	Air by-pass valve assembly	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	Compressor housing with bearing sub-assembly	Refer to INSPECTION [08/2015 - ]
Surging (Poor driveability)	Fuel pump control circuit	Refer to Fuel Pump Control Circuit [08/2015 - ]
	Spark plug	Refer to PROCEDURE - Step 3
	Port fuel injector assembly	Refer to INSPECTION [08/2015 - ]
	Direct fuel injector assembly	Refer to INSPECTION [08/2015 - ]
	Electric water pump assembly	Refer to PROCEDURE - Step 2 [08/2015 - 09/2022] , or refer to PROCEDURE - Step 2 [09/2022 - ]
	No. 1 valve rocker arm sub-assembly*	Refer to COMPONENTS [08/2015 - ]
Engine stalls soon after starting	Flow chart [Engine stalls]	Refer to Engine Stalls [08/2015 - 09/2018] , or refer to Engine Stalls [09/2018 - 09/2019] , or refer to Engine Stalls [09/2019 - 09/2022] , or refer to Engine Stalls [09/2022 - ]
	Fuel pump control circuit	Refer to Fuel Pump Control Circuit [08/2015 - ]
	Throttle body with motor assembly	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	Crankshaft position sensor	Refer to DTC P0335-11: Crankshaft Position Sensor "A" Circuit Short to Ground; DTC P0335-15: Crankshaft Position Sensor "A" Circuit Short to Battery or Open; DTC P0335-1F: Crankshaft Position Sensor "A" Circuit Intermittent; DTC P0335-2A: Crankshaft Position Sensor "A" Signal Stuck in Range; DTC P0335-31: Crankshaft Position Sensor "A" No Signal [08/2015 - 09/2018] , or refer to DTC P0335-11: Crankshaft Position Sensor "A" Circuit Short to Ground; DTC P0335-15: Crankshaft Position Sensor "A" Circuit Short to Battery or Open; DTC P0335-1F: Crankshaft Position Sensor "A" Circuit Intermittent; DTC P0335-2A: Crankshaft Position Sensor "A" Signal Stuck in Range; DTC P0335-31: Crankshaft Position Sensor "A" No Signal [09/2018 - 09/2022] , or refer to DTC P0335-11: Crankshaft Position Sensor "A" Circuit Short to Ground; DTC P0335-15: Crankshaft Position Sensor "A" Circuit Short to Battery or Open; DTC P0335-1F: Crankshaft Position Sensor "A" Circuit Intermittent; DTC P0335-2A: Crankshaft Position Sensor "A" Signal Stuck in Range; DTC P0335-31: Crankshaft Position Sensor "A" No Signal [09/2022 - ]
	Ignition system	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	Fuel pump assembly (for high pressure side)	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	Intake system	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	Valve timing	Refer to PROCEDURE - Step 6 [08/2015 - 09/2022] , or refer to PROCEDURE - Step 6 [09/2022 - ]
	No. 2 turbo pressure sensor	Refer to PROCEDURE - Step 1
	Electric water pump assembly	Refer to PROCEDURE - Step 2 [08/2015 - 09/2022] , or refer to PROCEDURE - Step 2 [09/2022 - ]
Engine stalls soon after slow down	Flow chart [Engine stalls]	Refer to Engine Stalls [08/2015 - 09/2018] , or refer to Engine Stalls [09/2018 - 09/2019] , or refer to Engine Stalls [09/2019 - 09/2022] , or refer to Engine Stalls [09/2022 - ]
	Port fuel injector assembly	Refer to INSPECTION [08/2015 - ]
	Direct fuel injector assembly	Refer to INSPECTION [08/2015 - ]
	Throttle body with motor assembly	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	ECM	Refer to TERMINALS OF ECM [08/2015 - 09/2020] , or refer to TERMINALS OF ECM [09/2020 - ]
	Crankshaft position sensor	Refer to DTC P0335-11: Crankshaft Position Sensor "A" Circuit Short to Ground; DTC P0335-15: Crankshaft Position Sensor "A" Circuit Short to Battery or Open; DTC P0335-1F: Crankshaft Position Sensor "A" Circuit Intermittent; DTC P0335-2A: Crankshaft Position Sensor "A" Signal Stuck in Range; DTC P0335-31: Crankshaft Position Sensor "A" No Signal [08/2015 - 09/2018] , or refer to DTC P0335-11: Crankshaft Position Sensor "A" Circuit Short to Ground; DTC P0335-15: Crankshaft Position Sensor "A" Circuit Short to Battery or Open; DTC P0335-1F: Crankshaft Position Sensor "A" Circuit Intermittent; DTC P0335-2A: Crankshaft Position Sensor "A" Signal Stuck in Range; DTC P0335-31: Crankshaft Position Sensor "A" No Signal [09/2018 - 09/2022] , or refer to DTC P0335-11: Crankshaft Position Sensor "A" Circuit Short to Ground; DTC P0335-15: Crankshaft Position Sensor "A" Circuit Short to Battery or Open; DTC P0335-1F: Crankshaft Position Sensor "A" Circuit Intermittent; DTC P0335-2A: Crankshaft Position Sensor "A" Signal Stuck in Range; DTC P0335-31: Crankshaft Position Sensor "A" No Signal [09/2022 - ]
	Ignition system	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
	Air by-pass valve assembly	Refer to ON-VEHICLE INSPECTION [08/2015 - ]
Unable/difficult to refuel	Fuel system (canister, refueling valve, roll over valve, fuel tank, etc.)	-
White smoke emitted	Flow chart [Turbocharger oil leak and white smoke]	Refer to Turbocharger Oil Leak and White Smoke [08/2015 - ]
Turbocharger noise	Flow chart [Turbocharger noise]	Refer to Turbocharger Noise [08/2015 - ]
Drive mode does not change	Drive mode select switch circuit	Refer to Drive Mode Select Switch Circuit [10/2017 - 11/2021] , or refer to Drive Mode Select Switch Circuit [11/2021 - ]
SNOW mode does not change	Pattern select switch snow mode circuit	Refer to Pattern Select Switch Snow Mode Circuit [08/2015 - ]

HINT:

*: Check "Fuel Cut Elapsed Time" in the Data List. If the elapsed time is over 0 sec, then the engine speed is high (the engine speed at which fuel cut occurs + 500 rpm or more). In this situation, there is a possibility that a No. 1 valve rocker arm sub-assembly will become loose and malfunction, check that the No. 1 valve rocker arm sub-assemblies are properly installed.

Refer to COMPONENTS [08/2015 - ]