P1401 on the 2021 Aprilia Tuono
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.
| A_210573_TC_EN | 2021-06-08. Service bulletin. [A_210573_TC_EN] Aprilia RS - Tuono 660: Availability of engine ECU calibration update Dear Dealer / Service Center, Please note that a software update for the engine control unit map is now available once the PADS diagnostic tool is updated to the latest release available. The aforementioned operation is considered part of the normal maintenance required for the vehicle, and must be performed during the pre-delivery procedure, for new vehicles, or, for vehicles that have already been sold and are in use, at the same time as other scheduled maintenance operations or at the first available opportunity when the vehicle is brought to the service center . The new update introduces the following main features and improvements: Resolved issue causing spurious diagnosis of error P1401 at key-on; Software bug fix; |
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1 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.