$350.00 (plus labor)for a VCT selonoid??? Thats what the shop told me. If we try and that isn't the problem, it can't be returned. The timing belt was rechecked and it is correct. We decided to try the Marvel Mystery oil and drive it for a couple of days and see if the code comes back. Will it hurt the engine to be driving around with this in the engine? How much should I add? It sounds to me that they don't know what else to try either. Any suggestions? Already have near $2000 into it for all of the work that has been done.