C1234 on the 2002 Toyota Sequoia
The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.
This code is specific to a manufacturer and is not described here. Its meaning is in the manufacturer's service information.
| T-SB-0012-18 | 2018-04-02. Service bulletin. TSB: Some 2001 ? 2002 model year Sequoia vehicles may exhibit intermittent VSC activation. After the activation, Diagnostic Trouble Code (DTC) C1234 is stored in the skid control Electronic Control Unit (ECU) memory. Follow the Repair Procedure in this bulletin to address this condition. NOTE ? This Service Bulletin is ONLY applicable if DTC C1234 is present. If DTC C1234 is NOT present, this Service Bulletin is NOT applicable. ? The yaw rate sensor is available as a separate service part allowing it to be replaced separately instead of the entire yaw rate sensor assembly (Yaw Rate Sensor, Decel Sensor & Bracket). Ensure that the NEW service part number is ordered for the yaw rate sensor. |
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| T-SB-0012-18 | 2018-03-12. Service bulletin. TSB: Some 2001 ? 2002 model year Sequoia vehicles may exhibit intermittent VSC activation. After the activation, Diagnostic Trouble Code (DTC) C1234 is stored in the skid control Electronic Control Unit (ECU) memory. Follow the Repair Procedure in this bulletin to address this condition. NOTE ? This Service Bulletin is ONLY applicable if DTC C1234 is present. If DTC C1234 is NOT present, this Service Bulletin is NOT applicable. ? The yaw rate sensor is available as a separate service part allowing it to be replaced separately instead of the entire yaw rate sensor assembly (Yaw Rate Sensor, Decel Sensor & Bracket). Ensure that the NEW service part number is ordered for the yaw rate sensor. |
2 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.