Question about 2001 Cadillac DeVille
You need to have the charging system and the battery tested again, this sounds like a poor connection inside the battery or a poor connection at the power distribution box under the hood, otr a defective voltage regulator diode in the alternator, low voltage causes the electronic control modules like the BCM (body control module) to go nuts and generate all kinds of weird symptom's. so do the flowing:
1. Have the battery cables cleaned and the battery load tested, replace and clean as necessary
2. Have the alternator tested for possible defective diode causing voltage spikes.
3. Have the battery connection to the Power Distribution box under the hood checked for corrosion or possible loose connections.
I suspect you have a defective battery or corroded terminals but do the tests to verify this, as far as the dealer checking this before if the symptoms were no showing the problem can be very hard to track down.
Posted on Jul 20, 2009
It looks like a wiring problem that comes and go with car vibration, or a faulty anti theft system kicking in erratically.
The problem with this kind of faults is that the mechanic can actually find the fault when the problem occurrs.
To start I suggest taking the car to a mechanic or to a car electrician when the problem is there, for example now that you have Service Engine message on display.
The mechanic will scan the ECU (car computer) to see if any fault code is stored in there.
If nothing is found, the next step could be excluding the car security system for few days, to check if the problem is related to a bad car alarm module.
If the problem persists without car alarm on , then it can be a wiring or a faulty ECU(car computer module), in that case better going to a car electrician to test the whole car wiring, and then eventually replace the computer.
Posted on Jul 20, 2009
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Posted on Jan 02, 2017
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Oct 26, 2012 | 2001 Cadillac DeVille
Whenever this warning or any other stays on in the dash it is indicating that the systems control module has detected a fault, it then disables the system as long as the light is on. You must now have the dealer hook up a special electronic diagnostic tool and "scan" the system for the fault code that is stored for the problem(s)
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