To find out what error code 11 (or whatever code it actually is) means, you'll need to do one of the following:
* Consult a Dodge B2500 repair manual: This is the most reliable method. The manual for your specific year and model will have a section dedicated to diagnostic trouble codes (DTCs).
* Use an OBD-I code reader: You'll need a scan tool designed for OBD-I systems (not all OBD-II scanners will work). These readers plug into the diagnostic connector under the dash (locate this connector in your manual). The reader will translate the code into something understandable.
* Find a mechanic specializing in older vehicles: A mechanic with experience working on 1996 Dodge vans will likely be familiar with the diagnostic codes used in your vehicle.
Important Note: "Eleven" might not be the actual code. You may be misremembering the code, or it might be displayed in a way that isn't a standard numerical code. If possible, carefully note *exactly* how the code is presented (e.g., a blinking light pattern, a numeric sequence on a dashboard display). The more precise information you have, the easier it will be to find a solution.