Free repair checklist
Read Your Own Check Engine Light — No Mechanic Needed
OBD-II scanners cost $20. Dealer diagnostics cost $150. Know the difference.
This checklist is a practical starting point. The DIY Mechanic System gives you a clearer path to diagnose the problem, plan the job, and complete the repair.
What this checklist covers
- Full list of common OBD-II codes explained in plain English
- What to fix yourself vs. what to take in
- Which scanners are worth buying in 2026
Ready for the full system?
Keep the next job moving.
Use the DIY Mechanic System to diagnose, plan, and complete your next repair with one clear subscription path and monthly or annual billing.
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