Ford Focus ST Forum A forum community dedicated to Ford Focus ST owners and enthusiasts. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! 4298 posts · Joined 2009. #12 · Oct 30, 2020 (Edited by Moderator) There was a problem on early MK3's built in the last quarter of 2012 blowing a piston due to a manufacturing defect which Ford were replacing the short block under warranty. Ford Focus Mk2 Common Problems Thread. By jamesm182, October 11, 2013 in Ford Focus Club Focus st line auto and Focus Titanium. fiesta boy · Started 18 hours ago. 2. My MK2 1.4 Petrol has the "IC display doesn't sleep" effect and lately it started to open up the boot randomly. Sometimes when I get into the car and sit down, the trunk-lock opens or when locking the car after arriving home it opens the boot-lock. Drives. RS/Mk2 GTi. 21 Dec 2020. #4. Its likely a loose/damaged hose, maybe even damaged intercooler, most can be handy got to with the lower front grill off and undertrays. I had the same issue on mine a few years back, “ESP system fault” appeared on the dash and no boost, it had split a weld on the intercooler. 5 days ago · Used 2018 (18) Ford Focus 1.0 EcoBoost 140 ST-Line Navigation Ford Focus MK2.5 (2008-2012) Stereo Removal ST/RS - James Simpson Buying review Ford Focus II ST (2005–2011) Common Issues Engines james-st. 3068 posts · Joined 2008. #9 · Apr 6, 2010. I found out mine was overfuelling at a RR session as afr was 10.4 . Maf was faulty. Also possible boost leak as most of my hoses wern't very tight especially the hoses on the turbo! much better now maf has been replaced and all hoses/clamps checked. Pitsparky said: The use of the word “common” is a massive exaggeration of the situation itself. Any major failure of the 20 year old Mazda L derived engine is extremely rare, 100,000’s if not millions produced without any issues whatsoever. You get the rare failure, probably on modified cars with possibly questionable treatment and .

ford focus st mk2 common problems