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CEL codesd read - misfire detected
My engine slightly stumbled on takeoff briefly, and the CEL came on... a couple weeks ago. So, I ordered the Durametric, and read the following codes:
P1319 Unknown DTC
P1317 Unknown DTC
P0300 Porsche fault code 507 Misfire detection
P0305 Porsche fault code 513 Misfire cylinder 5
So, Hopefully I have a simple plug or coil pack issue. This happened the one time in 105degF temp under otherwise normal driving conditions. WTF is an "unknown DTC"? I don't like it when a $300 tool tells me "unknown" 
...and would you guys suspect a coil pack as well? ...or even something else?
Thanks, Chris
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Chris Dennis, Plano, Texas
'07 Boxster, arctic silver, Tiptronic, 106k miles, no mods
‘13 Boxster S, black on black, PDK, 27k miles, garage queen
‘66 Mooney M20E, hangar queen
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