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Old 04-03-2014, 03:46 PM   #16 (permalink)
Chuck33079
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Join Date: Nov 2011
Location: Houston
Posts: 12,265
Drives: 2011 370ztt
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Quote:
Originally Posted by BrandonSS View Post
FWIW I had a recurring CEL as well (0300 IICR) and it turned out after 3 trips to the dealership that I had a hairline crack on one of my catalytic converters. This as after they replaced an o2 sensor and something else in attempt to fix the problem prior.
That's the problem with the P0300. Just about anything that triggers the knock sensor will trip it. A loud enough rattle at the right time, boom, CEL.
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