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Service bulletins for the 2002 Toyota Sequoia

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

161 on file from NHTSA, as of 2026-10-19.

About C1234 on the 2002 Toyota Sequoia: what the code means, and the bulletins and recalls about the same components.

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Only bulletins with trouble code: C1234 are shown. Show all

Bulletins, newest first
T-SB-0012-182018-04-02. Service bulletin. ELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC); BACK OVER PREVENTION. 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.
T-SB-0012-182018-03-12. Service bulletin. SERVICE BRAKES. 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.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.