A130 DIY to fix "Tighten Fuel Cap" message Page 3 AcuraZine

I have 2007 MDX and "tighten fuel cap" message keeps coming on as soon as I start the car. Got the car in December and it has been like that since.. 2012 Acura MDX Tech:Mods-Max Bore TB,Custom CAI, P2R runners, Laser lights, RV6 J-pipe, HI-Flow CAT, Ktuner, Sprint Booster, MDX spacer, Alpine amp and 8' JL sub, Custom LED'S.. When the tighten fuel cap warning is set, many times, this can mean more than a loose or faulty fuel cap. Sometimes this will be a leak in the EVAP (emissions control/recovery) System. So, first, check the underside of the fuel cap for any cracks or signs of defects that may keep the cap from sealing correctly.

This will reset the system that checks the fuel cap's presence and will probably solve the problem. But if you still see the "Tighten Fuel Cap" message, the best decision will be to physically check the sensor. Check the sensor on the cap; Checking a sensor is not a really hard task. You just need to open the fuel cap and look at it carefully.. Fuel Cap Warning Light on Acura TL (2012) Thread starter PeterGreen; Start date Oct 10, 2021; P. PeterGreen. Joined Jul 31, 2012 Messages 487 Location New York. Oct 10, 2021. after about a month the tighten gas cap light kept coming on, then I started getting an emissions system warning light. Brought it to an indie because I'm too busy to.