Good luck with testers. I seemed to get a different message for every different tester used on my car. For instance: bad torque converter or timing sequence problems. Torque converters for my car wander around the $1700 range. They wanted 10+ hours to access the timing (CL600) and another 6 hours to adjust it.
Know what it was? One of the cam position sensors had slipped! $200 fixed it! The timing problem came from a Star C (made with Chinesium) and the torque converter problem came from a very expensive Delco(?) tester.
You "pays your money"
You "takes your chances"
Anziani
'97 CL600 68K