Questions about your code, corrections to our guides, or general feedback. Pick the contact method that fits and we'll get back to you.
Questions, feedback, or saying hello. Most emails go here.
Stuck on a specific code or diagnostic question on your car.
Copyright claims, takedown requests, legal notices.
Interviews, quotes, publication inquiries.
Use the form below if you prefer. It routes to the same inbox as the email addresses above.
A few things that come up often. Reading these first might save you a day of waiting.
Most messages get a response within 48 hours on weekdays. Complex diagnostic questions sometimes take a day or two longer because I want to give you a real answer, not a generic one. Weekend emails usually get picked up Monday morning.
Sometimes, but not always. If you send me your year/make/model, the specific code, freeze-frame data, and symptoms, I can usually point you in the right direction. What I can't do is replace an in-person diagnosis for a weird intermittent problem. For those, you'll need a local shop.
Please send it. Include the page URL and the specific error or outdated information. I genuinely appreciate corrections and usually update within a few days. Accuracy matters more to me than looking right, so don't hold back.
Only from ASE-certified technicians with verifiable credentials. If that's you, email hello@cel.guide with a writing sample and your ASE verification. No generic content mills, no AI-generated submissions, no affiliate-heavy posts.
Not currently. Check Engine Light is a reference site, not a consulting business. For paid diagnostic help, the best option is a certified mechanic local to you or a mobile diagnostic service that can actually connect to your car.
If it's a common vehicle with well-documented CEL patterns, possibly. Send your suggestions to hello@cel.guide. Models I'm most likely to cover are those with 100,000+ units sold in the US and consistent reader demand.
Not at this time. Scanner recommendations on this site are based on tools I own and use, not paid placements. If I ever start taking partnerships or affiliate revenue, it will be clearly disclosed on every page where it applies.
For legal notices and formal correspondence only: Check Engine Light, c/o Marcus Reid, Columbus, Ohio 43215, United States. For day-to-day questions, email is much faster.