That's a slow responding O2 sensor code, bank 1, sensor 1.
It could be:
1. Dirty/Bad MAF sensor or wire issue.
2. Damage to sensor or wire on the primary bank 1 O2 (what the code actually means).
3. Something screwy related to the CAI diameter being different from OEM or possibly not being clamped down well enough (MAF's are VERY sensitive to vibration and airflow tumble effects on this car).
Try swapping or cleaning the MAF's. The the problem doesn't move/go away, look into replacing the Bank 1 primary O2.
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