The check engine light is lit on my 94 E420. I recently had the wiring harness replaced.

My mechanic seems to be having a bit of problems determining what the cause of the light is. He says the code that remains is pretty generic. He has taken 2 seperate readings (clearing light and codes in between). Here is what I'm told:

- Fault Codes Indicated:
DM CIRCUIT
19) Fuel Injector Circuit, Fault from fuel control system.

One thing that he noticed was that the engine was not reaching operating temperature, so he replaced the thermostat. He then reset the Engine control module stating "Possible adaptation out of range". Since then the light has come back on.

The car runs great and the gas cap is on tight.

Does anyone have any ideas as to what else we can check?

Thanks!

Willy
94 E420