Hi guys,

I have a 2011 Range Rover Sport HSE with 168k miles. Recently, I disconnected the battery and reset the ECM data to clear a P061A-64 historic code. (At first, I replaced the MAF sensor, but later realized the sensor wasn’t faulty—there was no dash light or any active code, the OBD showed it as a historic code.) After the reset, the code disappeared, and no warning lights or new codes are showing.

However, a new issue has come up:

--After driving for about 20 minutes, when I shift into P, the engine starts shaking at a very steady rhythm. The whole vehicle vibrates with it, yet the RPM holds steady at around 600.
--If I start the engine cold and let it idle, there’s no shaking at all.
--Driving in the city or on the highway is fine—no shaking or RPM fluctuation, even at red lights.
--My OBD reader isn’t detecting any new fault codes.

Additional notes:
--When I first tried to solve the P061A-64 code, I swapped in a pair of MAFs from another RRS. The same shaking occurred, but when I reinstalled my original MAF sensors, the shaking disappeared. Now, after disconnecting the battery (and forcing the ECM to reset), the shaking has come back. Could this be related to the ECM adaptation / relearning process? If it is, is there anything I can do to solve it?
--I checked the data stream and noticed the coolant temperature looks unusual, with 1 around 93 degree C, and 2 around 41 degree C.
--There are some misfires, but the count is very low, so I’m not sure they’re the cause.
--The passenger side of the engine cover feels noticeably hotter than the driver side.

Has anyone experienced something similar? Could this be an adaptation issue, or does it sound more like a bad coolant temp sensor / ignition problem? Any insights or suggestions would be greatly appreciated.
Thanks so much!