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My cars been acting up lately.. ran diagnostics on her and i got these codes. P0030, P0327, and P1516. Did some research on them but wanted some opinions and possible fixes from people with Cobalts. any tips on how to fix them etc.?
 

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I would start by seeing if the knock sensor, and o2 sensor are on the same circuit. If so, check resistance in the circuit. I could see excessive resistance causing those sensors problems, in turn tripping the t.a.c code. Just a guess, but an easy place to start.
 

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thanks, getting her checked out this week. i was thinking though the car came with a remote starter someone suggested that faulty wiring on the starter may be causing some problems.
 

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Sounds like dirty contacts on the BCM connectors again or loose or corroded battery contacts. BUT 0030 &0327 are ECM codes which might be caused by low voltage. Again battery terminals.
 
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