How do I check engine codes

[oldguy70]

How do I check my engine codes on a 98 Monaco Dynasty

[BFlinn181]

It would help us to help you if you give a bit more information. What engine do you have?

[oldmattb]

I have a 1998 Windsor. It does not have electronic controls on the engine.

Matt B

[oldguy70]

My engine is an 8.3 Cummins built in 97 and does not have electronic controls. The check
engine light is on so I would like to know why. It runs great

[jacwjames]

Here is a document I found on how to recover Cummins codes provided you have a button on your dash that is labeled Diagnostic or some variation of this.

Hope it helps.

[BFlinn181]

I've not seen the switch actually on the dashboard, but taped to the steering column under the dash. According to the document, "The engine protection system uses an indicator lamp to alert the operator of a coolant temperature high, intake manifold temperature high, oil pressure low, or coolant (water) level low condition."

The OP should know what conditions were present when the light was first noticed. If the engine was working hard at the time, the high coolant temperature could have triggered the warning, but it would have also been evident by the temperature gauge, same with low oil pressure, oil gauge would have been second clue. Unless equipped with a intake temp. gauge, that and the low coolant level has to be checked. If the engine wasn't being heavily worked, I'd check the coolant overflow tank. If it drops low, the light comes on but it very likely won't trigger any other gauges to indicate the fault. I'd start there. Make sure the tank if at the proper level and the sensor wires are attached.

[oldguy70]

Thanks for the reply's. I can't find any switch but I don't have a problem right
now. When I went to work on it every thing was normal, so it is hard to fix
something when it is not broke