my 2010 had a strangely similar issue once, I'd circle back to that bundle of wires near the power steering pump. I've seen a few threads out there on the internet about those wires rubbing through and shorting, and the weird nature of this one feels very similar. Your P219A could also be indicative of an issue with that side's injector's harness. I'd get the pin outs to the ECM and ohm the connector from the injector harness to the ECM and with your meter connected I'm betting you will see the issue if you jiggle that harness by the power steering pump.