Diagnostic Trouble Code Chart [09/2020 - 11/2021]

WARNING: This page does not describe the selected car, but rather 27 other vehicles, including the 2024 Lexus IS 500, 2024 Lexus IS 350, 2024 Lexus IS 300, 2023 Lexus IS 500, and 2023 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.

POWER STEERING SYSTEM

DTC No.	Detection Item	DTC Detection Condition	Warning Indicate	Note	Link
C1511	Torque Sensor1	Torque sensor malfunction	EPS warning light: Comes on	-	Refer to DTC C1511: Torque Sensor1; DTC C1512: Torque Sensor2; DTC C1513: Torque Sensor Deviation Excessive [10/2016 - ]
C1512	Torque Sensor2	Torque sensor malfunction	EPS warning light: Comes on	-	Refer to DTC C1511: Torque Sensor1; DTC C1512: Torque Sensor2; DTC C1513: Torque Sensor Deviation Excessive [10/2016 - ]
C1513	Torque Sensor Deviation Excessive	Torque sensor malfunction	EPS warning light: Comes on	-	Refer to DTC C1511: Torque Sensor1; DTC C1512: Torque Sensor2; DTC C1513: Torque Sensor Deviation Excessive [10/2016 - ]
C1515	Torque Sensor Zero Point Adjustment Undone	Torque sensor zero point calibration has not been performed.	EPS warning light: Comes on	There is no malfunction if this DTC is not output again after performing zero point calibration.	Refer to DTC C1515: Torque Sensor Zero Point Adjustment Undone; DTC C1516: Torque Sensor Zero Point Adjustment Incomplete; DTC C1525: Rotation Angle Sensor Initialization Undone; DTC C1526: Rotation Angle Sensor Initialization Incomplete [10/2016 - ]
C1516	Torque Sensor Zero Point Adjustment Incomplete	Torque sensor zero point calibration is incomplete due to the steering wheel being touched during calibration.	EPS warning light: Comes on	There is no malfunction if this DTC is not output again after clearing the DTC and performing zero point calibration.	Refer to DTC C1515: Torque Sensor Zero Point Adjustment Undone; DTC C1516: Torque Sensor Zero Point Adjustment Incomplete; DTC C1525: Rotation Angle Sensor Initialization Undone; DTC C1526: Rotation Angle Sensor Initialization Incomplete [10/2016 - ]
C1521	Short in Motor Circuit	Motor overcurrent	EPS warning light: Comes on	-	Refer to DTC C1521: Short in Motor Circuit; DTC C1522: Power Supply Sensor; DTC C1523: Current Deviation Excessive; DTC C1524: Motor Terminal Voltage; DTC C1532: ECU Malfunction [10/2016 - ]
C1522	Power Supply Sensor	Motor current sensor malfunction	EPS warning light: Comes on	-	Refer to DTC C1521: Short in Motor Circuit; DTC C1522: Power Supply Sensor; DTC C1523: Current Deviation Excessive; DTC C1524: Motor Terminal Voltage; DTC C1532: ECU Malfunction [10/2016 - ]
C1523	Current Deviation Excessive	Excessively large current deviation	EPS warning light: Comes on	-	Refer to DTC C1521: Short in Motor Circuit; DTC C1522: Power Supply Sensor; DTC C1523: Current Deviation Excessive; DTC C1524: Motor Terminal Voltage; DTC C1532: ECU Malfunction [10/2016 - ]
C1524	Motor Terminal Voltage	Short (or open) in motor circuit or abnormal voltage or current in motor circuit	EPS warning light: Comes on	-	Refer to DTC C1521: Short in Motor Circuit; DTC C1522: Power Supply Sensor; DTC C1523: Current Deviation Excessive; DTC C1524: Motor Terminal Voltage; DTC C1532: ECU Malfunction [10/2016 - ]
C1525	Rotation Angle Sensor Initialization Undone	Rotation angle sensor initialization has not been performed.	EPS warning light: Comes on	There is no malfunction if this DTC is not output again after performing rotation angle sensor initialization.	Refer to DTC C1515: Torque Sensor Zero Point Adjustment Undone; DTC C1516: Torque Sensor Zero Point Adjustment Incomplete; DTC C1525: Rotation Angle Sensor Initialization Undone; DTC C1526: Rotation Angle Sensor Initialization Incomplete [10/2016 - ]
C1526	Rotation Angle Sensor Initialization Incomplete	Rotation angle sensor initialization is incomplete due to the steering wheel being touched during calibration.	EPS warning light: Comes on	There is no malfunction if this DTC is not output again after clearing the DTC and then performing rotation angle sensor initialization.	Refer to DTC C1515: Torque Sensor Zero Point Adjustment Undone; DTC C1516: Torque Sensor Zero Point Adjustment Incomplete; DTC C1525: Rotation Angle Sensor Initialization Undone; DTC C1526: Rotation Angle Sensor Initialization Incomplete [10/2016 - ]
C1528	Motor Rotation Angle Sensor	Motor rotation angle sensor malfunction	EPS warning light: Comes on	-	Refer to DTC C1528: Motor Rotation Angle Sensor [10/2016 - ]
C1531	ECU Malfunction	ECU internal malfunction (CPU malfunction)	EPS warning light: Comes on	-	Refer to DTC C1531: ECU Malfunction; DTC C1533: Temperature Sensor Circuit is Low or High; DTC C1534: EEPROM [04/2013 - ]
C1532	ECU Malfunction	ECU internal malfunction (Peripheral circuit malfunction)	EPS warning light: Comes on	-	Refer to DTC C1521: Short in Motor Circuit; DTC C1522: Power Supply Sensor; DTC C1523: Current Deviation Excessive; DTC C1524: Motor Terminal Voltage; DTC C1532: ECU Malfunction [10/2016 - ]
C1533	Temperature Sensor Circuit is Low or High	ECU internal malfunction (Substrate temperature sensor malfunction)	EPS warning light: Does not come on	-	Refer to DTC C1531: ECU Malfunction; DTC C1533: Temperature Sensor Circuit is Low or High; DTC C1534: EEPROM [04/2013 - ]
C1534	EEPROM	ECU internal malfunction (EEPROM error)	EPS warning light: Comes on	-	Refer to DTC C1531: ECU Malfunction; DTC C1533: Temperature Sensor Circuit is Low or High; DTC C1534: EEPROM [04/2013 - ]
C1541	Vehicle Speed Signal	Vehicle speed signals via CAN communication are cut off for 3 seconds or more.	EPS warning light: Comes on	-	Refer to DTC C1541: Vehicle Speed Signal [09/2020 - ]
C1548	Active Steering Control Malfunction	There is a steering angle sensor recognition error.	EPS warning light: Comes on	-	Refer to DTC C1548: Active Steering Control Malfunction [10/2016 - ]
C1551	IG Power Supply Voltage	Open or short in IG power source circuit with engine switch on (IG)	EPS warning light: Comes on	-	Refer to DTC C1551: IG Power Supply Voltage [04/2013 - ]
C1552	PIG Power Supply Voltage	PIG power source circuit malfunction	EPS warning light: Comes on	-	Refer to DTC C1552: PIG Power Supply Voltage; DTC C1554: Power Supply Relay Failure [04/2013 - ]
C1554	Power Supply Relay Failure	Power source relay circuit malfunction	EPS warning light: Comes on	-	Refer to DTC C1552: PIG Power Supply Voltage; DTC C1554: Power Supply Relay Failure [04/2013 - ]
C1555	Motor Relay Welding Failure	Motor relay circuit malfunction	EPS warning light: Comes on	-	Refer to DTC C1555: Motor Relay Welding Failure [10/2016 - ]
C1567	Error in Matching of ECUs	There is a steering angle sensor recognition error.	EPS warning light: Comes on	-	Refer to DTC C1567: Error in Matching of ECUs [04/2013 - ]
C1581	Assist Map Number Un-Writing	Assist map not written in power steering ECU assembly	EPS warning light: Comes on	-	Refer to DTC C1581: Assist Map Number Un-Writing [10/2017 - 11/2021]
C1582	Assist Map Number Mismatch	Assist map number mismatch	EPS warning light: Does not come on	-	Refer to DTC C1582: Assist Map Number Mismatch [10/2017 - 11/2021]
U0100	Lost Communication with ECM / PCM "A"	Lost communication with ECM	EPS warning light: Does not come on	-	Refer to DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0132: Lost Communication with Ride Level Control Module; DTC U023A: Lost Communication with Front Camera Module [09/2020 - ]
U0129	Lost Communication with Brake System Control Module	Lost communication with skid control ECU (brake actuator assembly)	EPS warning light: Comes on	-	Refer to DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0132: Lost Communication with Ride Level Control Module; DTC U023A: Lost Communication with Front Camera Module [09/2020 - ]
U0132	Lost Communication with Ride Level Control Module	Lost communication with AVS ECU (absorber control ECU)	EPS warning light: Does not come on	w/ Adaptive Variable Suspension System	Refer to DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0132: Lost Communication with Ride Level Control Module; DTC U023A: Lost Communication with Front Camera Module [09/2020 - ]
U023A	Lost Communication with Front Camera Module	Lost communication with forward recognition camera	EPS warning light: Does not come on	-	Refer to DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0132: Lost Communication with Ride Level Control Module; DTC U023A: Lost Communication with Front Camera Module [09/2020 - ]