If it was actually caused by a loose cap, it will reset itself in a few days.
Reset the Check Engine Light by disconnecting the battery for about 10 minutes.
go to your dealer and they will fix it for you.
Replace your gas cap and reset the code.
GAs cap is more than likeky the problem, tighten the cap remove the emc fuse to reset the check engine light/ or tighten the cap and then take neg battery cable off for 5 mins to reset light
I replaced a broken Gas Cap 2 weeks ago and the Check Engine Light came on 1 week ago. I got the code P4055 today - and am hoping that the New Gas Cap will fix the problem. How can I reset the Check Engine Light?
To reset the gas cap light on your 2007 Dodge Nitro, first ensure that the gas cap is properly tightened. Drive the vehicle for a short distance, typically around 20 to 50 miles, as the light may reset itself automatically after a few cycles of the engine. If the light remains on, disconnect the negative battery terminal for about 15 minutes, then reconnect it. This may reset the engine control unit and clear the warning light.
My 2006 xA engine light will periodically come on even thought the gas cap is on. When that happens, I remove the cap and replace it double-clicking it to make sure it is sealed tight. I'm going to try and clean the gasket on the cap and where the gasket seals on the tube to remody the problem.
how do you turn off or reset the check fuel cap light on a 1997 Mazda b 2300 2.3 4 cylinder engine.
There is no reset button or procedure for the Check Engine light. The CE light is reset with an OBD2 scan tool. If the gas cap was just loose, then just tighten it, (3 clicks), and after you drive for a few driving cycles the CE light should go off. If it does not then the loose gas cap may not be the problem. This will require the ECU to be scanned with an OBD2 scan tool.
As long as it was full of oil when you cranked it, you did no damage whatsoever. The check engine light came on because the ECU detected a problem with the emissions system which was the cap missing. Have the check engine light reset and you will be fine. You can disconnect the negative battery cable for 5 minutes which may or may not reset the light. If not, it will have to be reset with an OBD2 scan tool.
with a scan tool after the repair has been completed.