DTC Description: Fail-Safe

WARNING: This page is about a different car, the 2019 Nissan NV3500 HD and 2019 Nissan NV2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

1st Fail-safe	The mode that the vehicle can stop safely, to prompt the driver to stop if the malfunction occurs and to shift to 2nd fail-safe early. It shifts to 2nd fail-safe or final fail-safe after the vehicle stopped.
2nd Fail-safe	The mode that the vehicle shifts to final fail-safe without changing the behavior, by identifying the malfunctioning parts in the condition that the driving force required for the driving is secured.
Final Fail-safe	Selects the shifting pattern that the malfunctioning parts identified at 1st fail-safe and 2nd fail-safe are not used, and then secure the driving force that is required for the driving. The mode that the shifting performance does not decrease by normal shift control.

DTC	Vehicle condition	Vehicle behavior for 1st fail-safe	Vehicle behavior for 2nd fail-safe	Vehicle behavior for final fail-safe
P0720	Between the gears of 1 - 2 - 3	Only downshift can be performed Manual mode is prohibited A vehicle speed signal from the combination meter is regarded as an effective signal	--	The shifting between the gears of 1 - 2 - 3 can be performed Manual mode is prohibited
	Between the gears of 4 - 5 - 6 - 7	Fix the gear at driving Manual mode is prohibited A vehicle speed signal from the combination meter is regarded as an effective signal	--
P0720 and P1721	--	Locks in 5GR	--	Locks in 5GR