It exactly means that in 1000 firing events 200 or more were defective on cylinder number 4 (or some such). Probably ignition related but not necessarily. (the code doesn't tell me this ... experience does)

The second code means your transmission controller has communicated a fault in its system to the ME controller and you don't have enough tool to figure it out. Code readers only talk to one controller out of probably twenty on your car.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician