My mother 1990 Lumina Sedan suddenly refused to.

Sorry didn't provide you all the details initially.
The car is a 1990 Lumina Sedan 3.1L motor. Vin T. No one has fooled around with the wiring prior to it not starting. I did mentioned privously that 12 years ago the CPS was gone and the mechanic either repaired it then or I keep remember something to the effect that he bypassed it and it would never ever act up again. (Maybe I am not remembering that correctly, can a car run fine for 12 years with the CPS bypassed?). Anyway dealing with today problem, the car was checked for blown fuses, (none had blown). I had put in a new battery knowing that the old battery wasn't the problem, but the old battery that was in when the car now failed to old and a bit weak ) What I didn't know was whether this would affect the mil codes storage? A retired mechanic friend of ours has a diagnostic reader and it found no codes with it, nor did we see any by manually jumpering A to B, just gave us the intial 12 code only.

So I do have an update on the current garage statement. They now said that there is only 1 CPS, but that it broke off when trying to replace it and they have to drop the oil pan to get after it, Apparently this is a rather lengthy job as they quoted that the Mitchell Book states it take 3.5 hours of labour to replace it. Yipes the bill is getting huge, and CPS replacement probably is not going fix it. Garage Mechanic also said that oil had leaked into the sensor and that it most likely wasn't working properly (can't these be tested) so therefore there first item to repair was the CPS, then possibly the ICM. I would think that if there was oil affecting the CPS that some form of car performance degradation would have been noticed before the car completely failed. (That wasn't the case, car ran fine beforehand). Problem I have with that statement is I cannot believe 2 items failed at the same time. The car was running perfectly fine prior to this, so I would assume only 1 critical component failed and not 2 or 3 or more. Opinions?

Thanks for your help JDL. Turns out after the changed the CPS and it still didn't work that the garage finally changed out the ICM (Ignition Control Module) and that fixed the problem. It too bad they didn't checked that first as that is what I mentioned to them was what I suspected was the faulty part. Would have save me have the cost of the needless repairs. Anyway my Mom back on the road and is happy.