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Old 01-30-2009, 01:16 PM   #1
jonus311
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Join Date: Jan 2009
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Default check engine light and antitheft light 2004 L300

Here I am again folks,
On the 2004 Saturn L300 (4cyld), I just recently replaced a bad engine control module. Now the car has its emmisions light on, check engine light on, and antitheft light randomly comes on 2 weeks after the module replacement. This just started happening today, but when I took the car in earlier to autozone for a diagnostic, it was saying random misfiring piston and catalatyic problem. But these were two previous codes that (I thought) had been resolved. I put in a new catalatyic converter and a new engine control module.
I read on other threads that it could the Body Control Module (BCM).
Does anyone have any suggestions before I take it to a mechanic?
Thanks for your help!

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