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Toyota TSB #K0A_Dealer Lette
2018 Toyota Sienna
TSB Document:
Affected Component: ELECTRICAL SYSTEM
- Summary
- Dealer Letter: The engine ECUs in the subject vehicles are equipped with software to monitor the rear oxygen sensors. Under a specific condition, this software may not detect a malfunctioning sensor due to an error in the software. As a result, affected vehicles do not meet certain onboard diagnostic (OBD) regulations.
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