Hi,

Was wondering if anyone has had a similar issue? A few days ago, my check engine light went on and had error codes 00301-06 - cylinder misfires. Noticed the engine running a little rough. I took it to the dealership (still under pre-owned warranty), and they told me it required software update for the ECM. They claim this is not warranty work but maintenance (even though the pre-owned warranty clearly covers the ECM). Any thoughts on this? I feel the dealer is nickel-diming me for $400...