Hi Group:

We've got a '94 850 Turbo sedan that keeps haunting me with the the same 2 fault codes, every few months (sometimes less, sometimes more) for the last several years. The codes from terminal A2 are always:

2-3-1: Haynes manual says, "Longterm mixture too weak or too rich in partial load stage".

1-5-4: "Leak in EGR"

So, is there any real problem, as after I reset the codes it's sometimes several months until they reappear? And, does a turbo'd engine even have EGR? Sometimes just the 2-3-1 code appears, but most often it's both, and the 1-5-4 has never appeared without the 2-3-1. We've had this car for about 5 years, and I can't say that there's ever been any fault code that's ever indicated a real problem, even when there was a problem with an applicable code.

Thanks in advance,

Dean