I have a 2018 Wrangler JL Sport Unlimited. I bought it used in June 2025 and the selling dealership had it for a month solving this same issue. Then in January 2026 the issue recurred, and a local shop diagnosed it as a software issue which they thought they resolved. Almost exactly 6 months later the issue has recurred, marking the 3rd time in 12 months this has happened. I plugged in an OBDII reader and get the same error code as before, "Bank 1 Lean". It's killed my MPG, and the jeep is running extremely rough. This is an extremely stressful issue, as I am a disabled veteran and not in a position to pay for rentals and shop costs.
