FYI, I had these dtc's intermittently, Testing in the shop showed everything ok. Dropped the pan and filter and found that the filter, (metal housing), had chaffed through the solenoid wire insulation and would short to ground once in awhile. Repaired wire until new internal harness comes in. HTH someone in the future.

Glen Beattie
Technician/Shop Foreman
Rescue Inc.
West Townshend, Vermont, USA