You’ll have to look up the code in a reference book or search the Internet. The least expensive auto code reader units are simple car code readers that burp up an alphanumeric trouble code but no information about what it means. An auto code reader give you a head start, but you’ll still have to do some detective work before you start pulling and replacing parts (more on this later). But it’s not a silver bullet that will always tell you exactly what’s wrong. It works by plugging into the car’s computer system and displaying a “trouble code.”Īn engine code reader/scanner is worth buying if you’re a fairly competent amateur mechanic who understands how an engine works. An engine code reader/scanner can help you make the drive/no drive decision and even help you fix the problem. You wonder if you should pull over and shut off your vehicle or drive right to a shop. Nothing can knock your day off track faster than a “Check Engine” light popping up on your dash. Then start the vehicle and follow the auto code reading procedure in the instruction manual. Plug your car code reader into the diagnostic link connector under the dash (engine off).
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