Prius Has Rough Idle
The ECM logic has been modified to reduce the possibility of the Prius idling rough, vibrating and the transaxle making a tapping noise. Updated software is now available.
| Photo Credit: ToyotaSome 2013-2015 Toyota Prius PHV, Prius and 2013-2016 Prius V vehicles may exhibit a vibration due to rough idle and/or tapping noise from the HV transaxle at cold start.
The check engine light may be on and random misfire DTCs may be stored (P0300, P0301, P0302, P0303, P0304). The ECM logic has been modified to reduce the possibility of the issue occurring. Updated software is now available.