CCM LIN-bus error is permanent error. It appears when there is a problem with one or more sensors connected to LIN 1/2. For example AQS sensor generate such error. Scan DTC and write it down here. There must be some error.
I have the same problem. I have a 2000 v70R with a m58 awd and i cant get it past 4k i manage to fix new wirings for clutch pedal sensor and have it retuned at a local shop with no sucess.