Posts Tagged: check engine light on no codes

Check engine light on no codes

Check engine light on, but no codes stored Check engine light on but no codes show up Many people post these questions in auto forums: “Why is my check engine light on?” “My check engine light is on. What’s wrong?” “My check engine light is on but no codes show up” They’re all looking for an answer as to why their check engine light is on but no codes appear. Here’s the answer. Code readers can’t read all trouble codes The On Board Diagnostic II system was set up to … Read More