There are literally hundreds of diagnostic codes that would cause the check engine light to come on. Many auto parts stores will check the codes for free and tell you what is needed to fix it.
You will need a diagnostic scanner to retrieve the codes.
Yes
There wasn't a 1998 Dodge Ram 1500 diesel.
No.
The check engine light must be on so, start with having the DTC's (Diagnostic Trouble Codes) read. The codes will help with determining what is wrong with the emission control system. Most of your local auto parts stores will provide that service for you at no cost.
No, the 1994 has a hydraulic governer. The 1998 has a electrical governer.
The abs computer has detected a malfunction and set a code. Have it checked for codes.
No.No.
yes a 15 inch wheel WILL FIT a 1998 dodge ram 1500
Yes they will bolt up.
No!
A 1998 Dodge Ram does not have EGR.