Hello,
I show no 2.0L engine for a 2006 Mazda 6, and I show no Direct Trouble Code (DTC) P2551 for this year, make, and model as well. Can you please double check your information and get back to us? We can go ahead and go from there.
Thanks,
Alex
2CarPros
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Wednesday, April 10th, 2019 AT 8:57 AM