I have a 2012 JKUR with about 70k on it. I have an odd issue I need help diagnosing. When I'm driving on the freeway at speed and hit a bump, like when the road changes or another bump, the traction control lite comes on the gas stops to slow the car down. It also happens on city streets with spirited driving over large bumps. The traction control lite usually goes off immediately, sometimes it stays on for a few minutes. It is a bit startling the first time it happens. It started a couple years after lifting it with a Metal Cloak 2.5 Game Changer. I just added another inch and mentioned the issue to the shop doing the work. They inspected the JKU and thought the rear track bar wasn't in in the right position on the read end. They adjusted it when they installed the larger springs (and ball joints, new rear shocks that were leaking). They test drove it and didn't feel anything but on the long drive home it happened again several times.

Has anyone experienced this issue, and found the cause/ solution? A couple years ago I switched the sensor below the center console (cant remember the name) hoping that would fix it, but it didn't.

 

It almost sounds to me like you have an ABS sensor wire either shorting out our a bad connection and the bump is causing a brief drop in signal and triggering the light. Have you ever been able to pull a code out of the ABS or transmission module? most the time if it's super brief you wont find a code logged.....only if it triggers things bad enough that is kinda throws you to limp mode.

 

It almost sounds like a loose battery connection. I had the same symptoms with my Jeep a few years ago and realized that my ground connection on my battery was really loose. I tightened it up and that solved it.

If it isn't a loose battery connection, then what Resharp said about a speed sensor either shorting out briefly or possibly going bad sounds like a real possibility.