Diagnostic Trouble Code Chart [10/2017 - 05/2018]

WARNING: This page is about a different car, the 2019 Toyota C-HR and 2018 Toyota C-HR. However, it is still accessible from the selected car via links, so may be relevant.

LIGHTING SYSTEM

DTC No.	Detection Item	Note	Link
B1244	Light Sensor Circuit Malfunction	-	Refer to DTC B1244: Light Sensor Circuit Malfunction [02/2017 - 09/2019]
B242C	Right Headlight ECU Malfunction	-	Refer to DTC B242C: Right Headlight ECU Malfunction; DTC B242D: Left Headlight ECU Malfunction [10/2017 - 09/2019]
B242D	Left Headlight ECU Malfunction	-	Refer to DTC B242C: Right Headlight ECU Malfunction; DTC B242D: Left Headlight ECU Malfunction [10/2017 - 09/2019]
B242E	Open in IG Circuit	-	Refer to DTC B242E: Open in IG Circuit [10/2017 - 09/2019]
B2439	Headlamp LH Circuit	-	Refer to DTC B2439: Headlamp LH Circuit; DTC B243A: Headlamp RH Circuit [10/2017 - 09/2019]
B243A	Headlamp RH Circuit	-	Refer to DTC B2439: Headlamp LH Circuit; DTC B243A: Headlamp RH Circuit [10/2017 - 09/2019]
B243D	Left Low Beam Fan Malfunction	-	Refer to DTC B243D: Left Low Beam Fan Malfunction; DTC B243E: Right Low Beam Fan Malfunction [10/2017 - 05/2018]
B243E	Right Low Beam Fan Malfunction	-	Refer to DTC B243D: Left Low Beam Fan Malfunction; DTC B243E: Right Low Beam Fan Malfunction [10/2017 - 05/2018]
B2451	Vehicle Specifications have not been Stored	-	Refer to DTC B2451: Vehicle Specifications have not been Stored [10/2017 - 09/2019]
B2456	Left Headlight ECU Variation Error	-	Refer to DTC B2456: Left Headlight ECU Variation Error [10/2017 - 09/2019]
U0073	Control Module Communication Bus OFF	-	Refer to DTC U0073: Control Module Communication Bus OFF; DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0142: Lost Communication with Body Control Module "B" [10/2017 - 09/2019]
U0100	Lost Communication with ECM / PCM "A"	-	Refer to DTC U0073: Control Module Communication Bus OFF; DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0142: Lost Communication with Body Control Module "B" [10/2017 - 09/2019]
U0129	Lost Communication with Brake System Control Module	-	Refer to DTC U0073: Control Module Communication Bus OFF; DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0142: Lost Communication with Body Control Module "B" [10/2017 - 09/2019]
U0142	Lost Communication with Body Control Module "B"	-	Refer to DTC U0073: Control Module Communication Bus OFF; DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0142: Lost Communication with Body Control Module "B" [10/2017 - 09/2019]
U0242	Lost Communication With Headlamp Control Module "B"	-	Refer to DTC U0242: Lost Communication With Headlamp Control Module "B" [10/2017 - 09/2019]
U1000	CAN Communication Failure (Message Registry)	-	Refer to DTC U1000: CAN Communication Failure (Message Registry) [10/2017 - 09/2019]