Check Engine Light

MNJKU

Jeep Newb
Have a 2013 Wrangler Sahara Unlimited with 70000 miles, pretty stock. Recently the check engine light came on, but no error code is being generated. The only symptons that I can see so far are the "ECO" light does not come on even coasting down a hill and there seems to be a slight hesitation/roughness when I accelerate for idle. Otherwise, it seems to be okay and gas mileage has not noticeably changed.

Thanks for your help!
 

MNJKU

Jeep Newb
Thanks for the replies. I haven't done a throttle body clean on this Jeep. Bought it about a year ago.
 

LoneWolf

Jeep Newb
It's fairly simple. The garage mechanic method is to just pull off the plastic air intake, pull off a battery terminal (to prevent throwing a code -- it's rare, but can be a pain) and use throttle body cleaner and an old toothbrush to clean outside and (carefully) inside the TB. It's a 15-minute job, taking your time.

Here's just one example. Plenty more on YouTube:
 
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