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For some reason even if my car is fully charged, right when I turn on the car the engine will kick in with a loud and nasty roar. Any ideas what could be causing it or how to fix it?
 

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For some reason even if my car is fully charged, right when I turn on the car the engine will kick in with a loud and nasty roar. Any ideas what could be causing it or how to fix it?
See the discussion in this thread. There is probably no problem to fix.
 

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For some reason even if my car is fully charged, right when I turn on the car the engine will kick in with a loud and nasty roar. Any ideas what could be causing it or how to fix it?
Have you tried letting the software reset? You have to keep the car off for several minutes. Sometimes it takes a couple of cycles to clear a problem. I would try that first.
 

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Or let the engine run for a good 5 minutes or so, and let it do its evap test. It'll shut off once its finished on its own.
 

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Separate issue than the engine always starting, but the 'loud and nasty roar' on initial start up is more than likely a dirty camshaft phaser/solenoid control valve which is common with these engines.

Basically leftover material from the casting process of the engine block can plug up the phaser/solenoid preventing the phaser from parking when the engine is shut off. The next start up you will hear that noise. Usually flushing the oil/cleaning the solenoid's mesh filter will fix the issue but it can require replacement of the phaser.
 

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The engine will throw a code when/if the phaser fails. Uncommon problem, but definitely happens. I've changed at least 3 phasers myself.
 

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Separate issue than the engine always starting, but the 'loud and nasty roar' on initial start up is more than likely a dirty camshaft phaser/solenoid control valve which is common with these engines.

Basically leftover material from the casting process of the engine block can plug up the phaser/solenoid preventing the phaser from parking when the engine is shut off. The next start up you will hear that noise. Usually flushing the oil/cleaning the solenoid's mesh filter will fix the issue but it can require replacement of the phaser.
Phaser? Really?

 
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