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Old 07-16-2017, 12:01 PM   #1
jarluk
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Join Date: Jul 2017
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Default 2009 Astra Diagnostic Error Codes, diagnostic help needed

I have these 4 error codes, vehicle was stuttering at low rev's and had check engine light on.

P0300
P0301

I have changed spark plugs to help with this but no change in performance

P0313
C1555

What are these codes? What is recommended course of action?

Should I invest in a new iginition coil pack?

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