General 1000 Engine & Transmission
2017 General. Problem: check engine light on, throwing 2 codes, sputtering. Had been sitting over the winter for a few months.
Checked Spark plugs, belt, both fine. Tried new O2 sensor and voltage regulator.
2 different codes;
1st code is 4/520209/1
2nd code is 4/520209/2
Any other ideas to try??