Nissan Altima Limp Mode
Vehicle goes into limp mode after about 45 mins to an hour
of highway driving. Vehicle doesn't do this when city driving
(errands, daily driving, etc.) When limp mode is activated,
vehicle throws no check engine or warning lights.
Transmission was replaced nearly 3 years ago. Fluid level is
within the safe zone. Coolant level is also good.
Lost on what would cause this issue.