Quote:
Originally Posted by CSI:86
The check engine light has gone. And there seems to be more power WTF 
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This happened to me yesterday too. BRZ was idling somewhat rough and almost stalled once. A few minutes later I got a CEL + slip light. Slip light went off, but CEL stayed on. I was close to my dealer so I dropped by and had them look up the code. First time the OBDII said no code found, but the CEL was clearly still there. Restarted the car and it pulled p0011. The technician
did not clear the code.
Went inside the service area to set up an appointment and when I started it up to leave, the CEL was gone. Took it out on the highway to make sure it felt fine and my butt dyno definitely says it had more power and ran smoother than it's ever run. Really weird.
Only mods I have are perrin catback, drop in filter, and inlet hose and they've all been installed for 5k+ miles. Manufacture date of 11/12, 6056XX VIN number.