My name is XXXXX XXXXX I am a professional here at Just Answer. I noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay.
The first thing I would do here since you did have a fault code for an air leak is re check the engine to make sure no other vacuum leaks are found and that all hoses and the air inlet to the engine is connected properly.
If you find a fault with another air leak or a hose incorrectly installed or damaged this would need repaired to correct this issue here.
If no other leaks are found and with a lack of power I would have the exhaust checked to make sure it isn't restricted,this can cause false codes like an air leak code to set in some cases as well as a lack of power.If there is a damaged or restricted exhaust component it would need replaced to correct this here.
Make sure your fuel filter is clean,if it hasn't been replaced within the last year this should be done to see if it corrects this fault.
These can be some of the common components that can cause this issue here that need checked into to locate the fault.
is my profile if you need anything in the future on your vehicle here,you can save it to your favorites and come back if you have any future questions on your vehicle (besides this question here)