DTC C1A47: Steering Angle Sensor [06/2018 - ]: Procedure

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2024 Lexus ES 350, 2024 Lexus ES 250, 2023 Lexus ES 350, 2023 Lexus ES 250, and 2022 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DTC

Turn the engine switch off.
Turn the engine switch on (IG).

Recheck for DTCs and check if the same DTC is output again.

Body Electrical > Blind Spot Monitor Master > Trouble Codes

Body Electrical > Blind Spot Monitor Slave > Trouble Codes

No DTCs are output.

Result

Proceed to
OK
NG

Result:

USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ]

Result:

See step 2

REPLACE STEERING SENSOR

Replace the steering sensor with a new or known good one.

Refer to REMOVAL [06/2018 - 08/2021] , or refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]

Result

Proceed to
NEXT

Result:

See step 3

RECHECK DTC

Turn the engine switch off.
Turn the engine switch on (IG).

Recheck for DTCs and check if the same DTC is output again.

Body Electrical > Blind Spot Monitor Master > Trouble Codes

Body Electrical > Blind Spot Monitor Slave > Trouble Codes

Result

Result	Proceed to
No DTCs are output	A
DTC C1A47 is output ("Blind Spot Monitor Master")	B
DTC C1A47 is output ("Blind Spot Monitor Slave")	C

Result:

END

Result:

REPLACE BLIND SPOT MONITOR SENSOR RH. Refer to REMOVAL [06/2018 - 08/2021] , or refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]

Result:

REPLACE BLIND SPOT MONITOR SENSOR LH. Refer to REMOVAL [06/2018 - 08/2021] , or refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]