What's the BMW code 4a74?

When You notice that there is a check engine light in Your BMW You will want to use an OBD II scant tool to read what is wrong with the ECU. Using this You can find out what has malfunctioned on Your car. If You happen to find code 4A74 that means that there is a problem with the glow plug controller. Diesel vehicles use glow plugs and they have a controller that gives them electricity and timing to help detonate the fuel in Your engine. If Your glow plug control module is going bad You will likely notice that Your engine is running rough and may be mIS Firing. It can also lead to damage to Your actual glow plugs if they are not getting the right signals.