If you hear something rev up when you hit the paddle, your engine is probably running due to temperature (ERDTT). Hitting the paddle disconnects a clutch in the drivetrain causing slightly less load on the engine, thus it revs up. That causes the engine to generate slightly more power, which leaves less "room" for the battery to accept regenerative braking power, so the paddle feels weak.
If it's 20 *F, you can go into Vehicle Settings > Climate & Air Quality > Engine Assist Heat and choose Deferred. That will prevent the engine from running above 15 *F.
If it's 20 *F, you can go into Vehicle Settings > Climate & Air Quality > Engine Assist Heat and choose Deferred. That will prevent the engine from running above 15 *F.
