2002 Saturn SL1. THe service enging light is flashing. exhaust is making noise, car has no power at all
You most likely have a plugged catalytic converter and a stuck open egr valve. Your car has two one is a digital electric and the other is mechanical, this is a common problem for that car. The digital is hard to find on the engine and hard to get at but if you want the procedure I can tell you how to fix it by removing and cleaning.
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