17 reactions | OBD fault code readers have been brought to the masses in recent years, but with so many engine scanners on the market, what one should you choose? We decided to buy a cheap and cheerful fault code reader and put it up against one of the market-leaders to see if paying that little extra, will make a big difference. | Fast Car Magazine | Facebook

Getting a Code 12 on your GM’s OBD1 scanner? That usually means your ECM isn’t receiving the distributor signal, which affects spark timing and can lead to hard starts. Haynes Manuals give you the step-by-step help you need to trace the problem and get your vehicle back in shape. Don’t guess—get expert instructions at haynes.com. #HaynesManuals #GMFix #HaynesShowsYouHow | Haynes Manuals