GoKawiilJeep owner uses Claude AI and Arduino to fix 1994 Cherokee's smog-test failures
Muhammad Zulali connected his 32-year-old Jeep Cherokee's primitive engine computer to a laptop using a $3 Arduino Nano, then used Anthropic's Claude AI to decode the vehicle's Chrysler SCI communication protocol and diagnose excessive NOx emissions. After initial tuning attempts made the car fail California smog tests at both 25mph and 50mph, Claude helped guide further adjustments to the air-fuel mixture that eventually brought emissions into compliance.
GoKawiil's interpretation of the reporting above, not reported fact.
The project shows how AI coding assistants can help hobbyists reverse-engineer obscure hardware protocols that would otherwise require specialized diagnostic equipment, potentially saving money on repeated smog-test fees that cost nearly $100 each attempt. It also suggests AI tools could extend the usable life of older vehicles by making their undocumented electronics more accessible to amateur tinkerers rather than requiring professional mechanics.
- A 1994 Jeep Cherokee's ECU was interfaced with a laptop using a $3 Arduino Nano and under $15 in total parts.
- Claude AI identified the car's obscure Chrysler SCI serial protocol and guided code written by Codex to read and adjust engine data.
- The tuning process involved trial and error, with some adjustments initially worsening emissions test failures before improvements were achieved.
Arduino Nano Every Board — This is the exact type of microcontroller board used to tap into old ECUs and start reading live engine data, just like in the Jeep hacking project. It's a great entry point for anyone inspired to try their own AI-assisted car diagnostics or DIY electronics projects.
See Arduino Nano Every Board on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: tomshardware.com — Mark Tyson, 2026-11-13
Published there as: “1994 Jeep Cherokee owner hacks 32-year-old car with Claude AI to pass California smog tests”
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