nogoodbum

Ford did a very poor job of explaining the different modes of the HVB programming via the owner's manual for average drivers. If anyone has figured it completely please post. One thing to keep in mind as you travel. the HVB performs best & last longest at the same temps as humans do [60-80 F] I you travel to an area of the country with high temps & low humidity, you may be comfortable at 85F+ & a light breeze but your HVB won't be. As I understand it, most of the cooling air for the HVB comes from inside the car cabin to keep cool. May want to keep the AC on in spite of what little gas you may save with it off.

Hello Ctgriffi. fellow 2013 owner here. Car looks great, made me want to give mine a bath to keep up but its cold & rainy here. I'm at 172k without any problems except with replacing a bad 12v battery with another bad 12v battery until I got a good one. [both via Ford dealer] There has been a lot of speculation concerning the failures of the C-Max transmissions & the causes. There was some reports of failures that involved ones used as govt. vehicles in the Phoenix, Ariz. area. Whether the cause was bad builds, high operating temp. conditions, or improper upkeep are all up for debate. The facts are the C-max came standard with standard fluid subject to heat related losses & without a dip stick for checking level far too many non-Ford service centers & owners assumed it was a non service item [know this from personal experience]. I assume you have had the trans fluid changed as it is a service item at 150k per owners manual. Any C-Max owners out there reading this should look into changing their trans fluid & making sure level is checked at every oil change [per owners manual] regardless of what their service tech tells them. Sorry for the long reply & Thanks for the read. PS. My last two Fords [89 Festiva & 98 Taurus] lasted 350k & 400k. i was driving 40k-50k yearly for work but now retired. I hope & believe my C-Max will out last me, 5-10 yrs.

Don't know if this could help. I had a short lived problem with key less touch during a spell of rainy, heavy dew in the AM weather. On the drivers door only as I rarely or never open passenger door first. Changed my daily parking to put driver's side into more of the sunny side. Has not recurred since. Hope this helps & tanks for the read.

Hello, welcome to the forum. After reading your post, i assume that your have read the codes & they are misfire related. You appear to have attacked the problem on the ignition & air as the source of the codes. [I am unsure what you call the engine igniters]. You may need to look at the fuel-related part of the equation. The C-Max seems to throw codes more quickly than most other cars I have owned, [may be my mis-info, no verified stats]. You may help the problem by using a good fuel injector cleaner for a couple of tanks of gas & on a recurring basis if this helps. Thanks for the read.

2013 SEL, Having a problem with the driver's side seat belt not retracting with enough tension or not at all occasionally. Do I need to replace or will lubrication help or is there an adjustment possible on the return spring? Any help is wanted including how to access retract mechanism. Thanks in advance.

2013 C-Max SEL. Car has begun to alarm the front parking sensor [solid beep] when coming to or stopped when driving in the rain. Suspect sensors may need replacing & am unsure where they are located in front & how hard they will be to replace. Do I have to remove front bumper cover or more to replace? If is above my limit I'll just live with it, can't afford the 5 days or $500 it will take dealer to fix. THANKS for the read & any advice given.

Update: Replaced the rear shocks & mounts on my 2013 SEL. Right side shock was about 50% effective, both mounts hard rubber parts showed signs of wear. Neither mount was cracked. Cured about 90% or more of noise from rear. Hopefully I can replace front struts in due time. 2013 SEL 160K. Thanks for the read

Welcome to the forum. There's not much to check on with a car with so low of mileage other than maintainance records & any accident reports. Since lead acid batteries degrade almost as much from age as they do mileage, unless it has been replaced, it is about 7yrs old, so if possible check the 12v battery. It is entering that age when LA batteries start to fail. [Not just on the C-Max but most 12v batteries in all cars]. With that low of use/mileage, it is possible fuel may show signs of getting stale, [easiest way to tell is by smell of the exhaust]. Would suggest using fuel system cleaner the first few tanks of gas if you decide to purchase. Merry Christmas & Thanks for the read.

Hi, Welcome to the forum. One possibility that you may not want to face, but honestly have to, is that the previous owner/dealer may be overstating repairs and/or upkeep done to the car to increase the resell value. This is hardly the first time this has happened & will never be the last. Without actual paper receipts from the battery replacement sellers & the shop that did the installation or reported via CarFax, I would be wary to believe what has been claimed to have been done to the car. If you bought the car with any kind of WRITTEN guarantee, you may have some legal recourse. IF not, it's as is, sorry it's on you now. Probably need to check for any codes & search the forum for others with like problems and their solutions. Really hope you get it worked out & Thanks for the read & sorry for being a Debbie Downer.

Thanks cr08 for the info, I knew someone out knew more than I did about the voltage #s. My suggestion of a bad 12v battery is based on my experience with one. First SSN message stopped at light, second, driving at 55mph, third. driving at 30mph. Ford dealer service center was never able to get the problem to reoccur & had no codes to tell them what to check. They spent 10 weeks total "looking" for the cause. The last week was waiting for their transmission tech, thinking that was the cause. He or somebody finally checked the 12v battery & found it was bad. I believe they did not think it was the problem because it was "only" a year old from when they sold & installed it. I believe the battery had been sitting in their stock for years prior to install but I'm not a "Ford certified tech". Hope this helps & thanks for the read.

From the effects that you are getting, IMO, it sounds as if your 12v battery is failing or borderline. A voltage drop even while driving will spark the SSN message & may go away when battery recovers. When voltage drops, stored codes are being erased. If you can hook-up a voltmeter, I believe you should get 13.5+ volts ICE on or in ACC mode. ICE & ACC mode off, 11+ volts. [please others with more knowledge chime in with better volt numbers]. You can check for a voltage drop when you put on breaks & hopefully it is a brake light short causing problems. Again this is just IMO, no sure fix. Hope this helps. Thanks for the read.

Add to my post [sorry], my car is a SEL Hybrid, reg model. 155k miles. has not needed to add oil between changes since I bought car [knock wood]. Had trans fluid changed at 100k no issues with it before or since.

As I read your post, it sounds like you are concerned with the life of the HVB & possible failure. The vast majority of HVB failures have happened to the ENERGI models of the Ford C-Max. The ENERGI model has a HVB that is three times larger than a standard model is more prone to heat related damage. IMO, the cooling system for the HVB is more than enough on standard but fall short on the ENERGI in some cases, [outside temps, driving styles, & other factors]. The ENERGI model also has controls that allow owner to have input on charging & battery use, the standard is controlled by the car's programming. Again IMO only, I suspect failures have been more prone due to high heat in battery pack & some owners unknowingly putting too much stress on HVB for long life. The ICE in the C-Max is a solid little motor, more than up to the job as long as you take care of it with regular maintaining, [good oil & filters, good gas, & quality replacement parts]. The transmission failures reported in the 2013-2014-mid/2015, IMO, may have been pushed by the fact that without a regular dipstick. owners & a lot of mechanics make a mistake & believe that the trans is a sealed unit. This happened to me at a national chain, [cough cough Firestone cough cough]. The C-Max came with reg/non-synthetic trans fluid & is much more apt to heat related loss than full synthetic. I am not stating that this is the cause but just something that may have helped the problem occur. This problem is not just a Ford issue but is a CVT issue across the board. Have a neighbor with a Nissan Altima with a failed CVT right now & no dipstick on CVT [but he drives like Richard Petty, so who knows]. If you decide on one or the other C-Max, the first thing I would suggest is to change trans fluid if it hasn't been done before. A lot of owners of the Ford C-Max have had issues with the 12v battery. It seems to cause a different effect when it fails for every single owner, making it hard to pinpoint. Totally unlike what we are expecting, some of us for 50+ years of car ownership. Sorry for the long post & Thanks for the read.

As I understand it, rear shock mounts are made from cast aluminum & are prone to breaking with a harder than usual hit. I have like noises from my C-Max also, but am waiting for my budget to replace both rear shocks & mounts. [Social Security sucks sometimes.] If this turns out to be the cause, please let me/us know. Thanks for the read.

Had this occur also. For me, it turned out it happened if I had my cell phone held/placed between key fob & ignition. hope this helps but no sure fix, sorry.