Had a low restriction muffler installed 2 weeks ago. I put in the K&N cold air induction system last weekend. Saturday I bought a locking gas cap and put it on. Wednesday morning when I started it, both the check engine light and the traction control light came on and won't go off. Checked the K&N connections. Took off the gas cap and then cranked it back on to make sure it was on tight. Also pressed the traction control button a bunch....the light stays on. The one thing I didn't do was disconnect the battery when I put in the K&N cuz I didn't want to lose all my radio settings. Whadaya think? :unsure: