Have exactly the same problem except P0122. Floor it cold and not much happens for a while. Usually heals when warms up. Ordered a replacement on e-Bay that included connectors (one if manual trans, 2nd two wire connector if automagic) & stubs, makes easy to check on bench. Should be here late next week.
ps when not driving I leave my toys on a NOCO Genius 1 float charger. Also I replace only with AGM batteries and use synthetic oil