Your 2007 Dodge RAM truck has a problem. The diagnostic system has detected a malfunction, issued a trouble code and activated the "Service engine" light on your dashboard. You can either pop the hood and troubleshoot the problem by trial and error, or you can save a lot of time and have a scanner do it for you. Trucks manufactured after 1996 are required to use On-Board Diagnostic trouble codes, and an OBD-II scanner can access these codes. This sort of diagnostic tool is widely available, and it will save you money in mechanics' fees over the long term.
Drive to an automotive parts store, or any discount superstore with a car department, and purchase an OBD-II scanner. The price tag might inspire sticker shock, but if you consider that many mechanics charge diagnostic fees, this piece of hardware can be deemed as an investment.
Turn off the engine once you arrive home. Leave the key in the ignition, however.
Exit your Dodge truck, but leave the door open.
Search beneath the steering wheel for a diagnostic port. It is black and it has 16 receptors for the scanner's 16-pronged plug.
Insert the scanner's plug into this diagnostic port.
Turn the scanner on.
Turn the Dodge's key so that the electrical system comes on. Wait a few seconds, and if the trouble code doesn't appear on the scanner, recheck that the plug is firmly in the port, and start the engine.
Write the trouble code onto a note pad, once it appears on the scanner. Then, shut the scanner and the Dodge down. Remove the key from the ignition and shut the truck's door.
Find the definition for the trouble codes you retrieved. Most scanners' users manuals have a listing of codes, but if you do not have the manual and need to search the Internet for a definition, you can find detailed listings at Obd-codes.com, Check-engine-light.com or Actron.com. Once you've looked up the code definition, you can decide for yourself whether to attempt a fix or consult a professional.
