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So I noticed yesterday that my brake light & battery light when on at the same time. Originally I thought it was a sign of a bad alternator , than today I was driving to autozone and my headlights went out and my car stalled. I plugged in the code reader and the p1605 code came up, now I found an ECM for cheap but if it's the battery and not the ecm I could save alot of money I can't tell whether the battery is the reason for the ECM code or if it is just the ECM that needs replacing. Anyone experience this? I need help? Autozone code
