Question about 2002 Cadillac Deville
In short, yes they are doing this to generate business.
They also make diagnostics difficult, so we have to take them back for a "plug in" for a high fee.
I have a Peugeot with the same deal & it stinks.
It could be set within the engine management system to time out after a while if you do your own servicing.
Buy an OBD II reader that will connect to your vehicle that should be able to reset this - and tell you of any real problems.
There are many makers of these - so make sure it will work for your make and model, and that it can reset engine lights.
Posted on Feb 08, 2010
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Posted on Jan 02, 2017
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Apr 20, 2015 | Cars & Trucks
When the service engine soon light (Also called the check engine light or engine management light) is turned on this is to alert you to the fact that Powertrain Control Module (computer) has detected a failure somewhere in the systems it controls you may not feel any difference in the way the engine runs, this can be the transmission or the engine or emission system, there are fault codes set in the modules memory for these faults. What needs to happen now is to have the powertrain control module scanned with a special tool called an OBD2 electronic engine control scanner or a OBD2 code reader. Once the code(s) are read then you must perform the diagnostics for each code and make the appropriate repairs based on the findings of the diagnosis that was performed, this is called doing "Pinpoint" testing.
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