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post #1 of 5 (permalink) Old 05-06-2014, 06:29 AM Thread Starter
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05 Cobalt LS Fails to Come to Life Randomly

Hello Everyone,

Its been a while since Ive been on here, school and work just suck lol.

I have an issue with my 05 Cobalt LS Sedan. No extras added to car besides aftermarket headlights and HID's.

This has happened three or four times now. I scanned it and got the code P0302 Powertrain Cylinder two misfire detected. But I don't exactly thing this is my issue causing the following problem.

ISSUE: I turned my car off and it completely died (radio shut off before I even opened door). I tried to restart it and nothing. No response. Waited a bit, tried again, nothing. Went into the trunk, disconnected battery terminal, reconnected and Woila. Started This happened twice. (Starts fine after that.

Now the next two times, (Over about 4-5 days) The car wants to start, but no cranking. Lights turn on, but when I try to start it nothing happens. No other codes were detected. Terminals are secure.

Any ideas? Thanks in advance

---------- Post added at 05:29 AM ---------- Previous post was at 05:27 AM ----------

Ohh yeah, I also have a remote started added to the car about two years ago.... Never any issues and I was not using the remote starter to start the car
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post #2 of 5 (permalink) Old 05-06-2014, 07:23 AM
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Have you had your battery checked lately? How old is it?

2010 Cobalt LT K&N TYPHOON INTAKE
2004 Cavalier LS clone
2003 Saturn L200 Fully loaded-Sold
1987 Toyota Celica
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post #3 of 5 (permalink) Old 05-06-2014, 12:23 PM Thread Starter
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Battery is around 5 or 6 years old I believe. I can have it tested later today or tomorrow. Once I disconnect and reconnect the battery terminal it starts without a hiccup. I think im due for a new one anyways, the winter we had here was brutal. Any other ideas?
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post #4 of 5 (permalink) Old 05-06-2014, 02:05 PM
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Batteries usually have a lifespan of 4-5 years. So that would help. Other than that idk

2010 Cobalt LT K&N TYPHOON INTAKE
2004 Cavalier LS clone
2003 Saturn L200 Fully loaded-Sold
1987 Toyota Celica
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post #5 of 5 (permalink) Old 05-06-2014, 04:51 PM
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I would agree with FloodKillaz, battery's lifespan of charging from the alternator is roughly 3-5 years, depending on how many additional accessories you put on it. If you can by any chance, take it down to any dealership that offers a multi-point inspection and see if a battery test is mentioned in there. Most likely a dealership will use a M800 battery tester with a printout. It should determine what your battery's CCA, temp, volts, and CA's it is pumping. Did your battery start having issues after you installed the HID's?

Does the battery light come on in the dash? Curious to know if it is.

2009 Cobalt LS XFE U74
Mods: K&N Typhoon Intake, Option Cat-Back Exhaust, Cosmo Short shifter, Maxxim Ahead 17X7's, MPx shorty antenna, FE5 Strut/shocks, Tein S Techs, Moog endlinks, Moog spring seaters, ZZP shorty header, LSJ downpipe, LNF front grille
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