Just bought the car last week to relieve some miles from my lease. It has 112k miles on it, but in beautiful condition. Went through VW inspection and came out good, just need rear brake pads and air filter.

CEL came on yesterday, autozone P1151 about 75 miles after the rear brakes and air filter was changed. Car still runs great, good power, only getting about 300 miles per tank on 75% E-Way use (does this seem right?)

Any ideas on where I could start with this without spending a fortune?

P1151
error code P1151 "bank1,Long Term Fuel Trim, Range 1 leanness Lower Limit Exceeded".

Explanation - fuel pressure or volume

Probable cause
Check engine for vacuum leaks
blocked or failed fuel injectors
MAF Sensor Failure

Is there an easy way to check for vacuum leaks at home?

Again car runs great