I have a 06 Liberty Sport, Yesterday it started making a beeping sound like when the gas light comes on except the gas tank was 3/4 full. I caught a glimpse of the dash when it beeped once and the odometer said "gas cap". I tightened the gas cap but it is still beeping everyonce in a while. I just put a K&N Intake and Magnaflow Cat Back on the car last weekend so I dont know if i may have knocked something loose when I was installing them? Any Ideas would be greatly appreciated.

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2006 Black Jeep Liberty Sport
Mopar Front Tow Hooks
Full Mopar Skids
Custom Interior Rack
K&N 77 Series Cold Air Intake
Magnaflow Stainless Cat-Back Exhaust

Not sure if we have an oring that seals the cap or not but if there is check it..... may not be seating well??

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Pre-Lowered 02 Liberty
2.5" Rustys Coil w/ Ranchos in the rear.
ARB, OME927's, 1/4 strut plate and Als Gen 4.5 Uppers in the front.
Flowmaster Super 40 Series (GONE, SO QUIET!)
245/75/16 Kumho KL-78 w/ Spidertraxxxxx
Ripped out the plastic inner wheel liners
Herculined ALLLL over.....