The pressure gauge is calculated based on oil pressure switch, engine speed data and engine head temperature sensor (as opposed to the coolant sensor) When the car is fully warmed up, the pressure gauge should be exactly 1/8th of the way (halfway between 0 and the first tick mark) - common internet knowledge says it should be just below the Tutorial on how to reset the Oil Change Reminder Indicator on Ford Transit Connect (Titanium, XL,XLT) from year 2002-2003-2004-2005-2006-2007-2008-2009-2010-2011-2012-2013-2014-2015-2016-2017-2018-2019-2020. 2000-2013 Ford Transit Connect Service Oil Light Reset . STEP 1. Turn the Ignition ON, Don’t Start the Engine. STEP 1 eBiW.