1998 dodge b3500 check engine light is on but scanner detects no codes any ideas what you should start checking?
If you check into the TSB's online you will find that a bulliten was issued for that problem.I believe it was issued in 1999. Some type of electrical short or bad connection in the wiring harness that your instrument cluster plugs into. You have to pull the cluster out and change the connecters.
The computer illuminates the "check engine" light when it detects a condition needing attention, such as a faulty sensor. The computer will FLASH the check engine light when the condition is significant and should be addressed immediately. You can purchase, rent or borrow a computer code scanner at most auto parts retailers such as Checker Auto Parts or Auto Zone.
It means that the computer has stored a diagnostic code and you should connect a code scanner to determine what the code means. If you can't do it yourself, you should take it to a shop. When something goes wrong, typically with a sensor or other electronic device, the computer detects the fault and stores it for diagnostic purposes, but you need to read the code to find out what it means.