DTC Codes
If your vehicle uses an Electronic Injection, then when your engine or its connected sensors and actuators when faulty will probably throw a fault code within the Engines Electronic Control unit.
Llandow Tuning provide a completely free service where you can lookup the most common codes and find possible solutions to even the most difficult problems.
Simply click on your vehicle manufactuerer below and we'll help you find out what the DTC code means. For engine codes you can use any cheap scanner from Amazon or eBay if your vehicle is made after 2005.