Applicable Models Aprilia Tuono V4, RS660, Tuono 660, Tuareg 660 (from MY2021 onwards), and other vehicles equipped with Marelli Euro 5 / Euro 5+ ECUs. Purpose This procedure resolves the activation of the MIL (Malfunction Indicator Light) and clears the P1309 error code, which is related to a flywheel synchronization issue or false misfire detection.Continue reading “Tone Wheel Sync Procedure for P1309 Error – “RPM Bomb” (Aprilia/Guzzi Euro 5 and Euro 5+ Models)”
