I'm not sure if you ever checked your knock sensor wires for any fraying/cutting due to the wires rubbing against the engine block.  Z

I haven't gotten under the car to check the wiring yet.  Seems a little hard to believe that both wires for two different pre-cat o2 sensors would fry at the same time, but I guess anything's possible.  Not finding any vacuum leaks.  I'm hoping a PCM calibration will fix this issue if cleaning the maps don't. 

I'll be at ford monday morning to see what they can do for me.  I'll be there anyway for a bad front wheel bearing that hopefully should be covered under the powertrain warranty that has a couple thousand miles left.  I'll talk to them about the PCM flash while I'm there.

Quote from: pmezo33 on September 18, 2015, 01:13:39 PM
I haven't gotten under the car to check the wiring yet.  Seems a little hard to believe that both wires for two different pre-cat o2 sensors would fry at the same time, but I guess anything's possible.  Not finding any vacuum leaks.  I'm hoping a PCM calibration will fix this issue if cleaning the maps don't. 

I'll be at ford monday morning to see what they can do for me.  I'll be there anyway for a bad front wheel bearing that hopefully should be covered under the powertrain warranty that has a couple thousand miles left.  I'll talk to them about the PCM flash while I'm there.

So what ever happened to your mks? I recently put bg 44k in my tank and was doing some pretty hard pulls then the CEL came on, the car started to have a sight weird smell and i got the same 2 codes. I feel like pulling hard released alot of built up carbon and maybe ruined my sensors or cats? Also i just put new plugs in gapped at 0.030 because i will tune within the next few weeks. With me being stock could the smaller gap cause the code?

A smaller gap will make the car run a bit richer, 0.035 is ideal for the 2010 stock, but still OK. Nowadays, they put in 0.030 at the factory, maybe tuned to accommodate.

The 44K wont affect the carbon issue because that is on the back of the intake valves where 44K doesn't reach.  It could possibly have dissolved more than usual impurities in the fuel system, if they were there to begin with.  Shouldn't cause issues with the sensors/cats (permanent).  Did you reset the codes and see if they come back?

Will do after work. Thanks for the info, you guys are the best as always!

Quote from: salsathe4th on July 15, 2016, 09:18:42 AMSo what ever happened to your mks? I recently put bg 44k in my tank and was doing some pretty hard pulls then the CEL came on, the car started to have a sight weird smell and i got the same 2 codes. I feel like pulling hard released alot of built up carbon and maybe ruined my sensors or cats? Also i just put new plugs in gapped at 0.030 because i will tune within the next few weeks. With me being stock could the smaller gap cause the code?

Changed the two o2 sensors with motorcrafts.  Has been good ever since.  It was definitely the sensors with me.  I didn't have any weird smells or anything though.  Just the CEL.  Everything else was normal.

Sal IMO would not worry about the codes for now as long as NO MIL was set off....just reset the codes and see IF and HOW Fast they return. How many miles on your MKS?  Z

Quote from: ZSHO on July 15, 2016, 01:47:58 PM
Sal IMO would not worry about the codes for now.....just reset the codes and see IF and HOW Fast they return. How many miles on your MKS?  Z

just over 96,000 I just reset them during lunch. Drove it around for an hour with nothing. Will see what happens on the way home.

Quote from: salsathe4th on July 15, 2016, 02:28:29 PM

Quote from: ZSHO on July 15, 2016, 01:47:58 PM
Sal IMO would not worry about the codes for now.....just reset the codes and see IF and HOW Fast they return. How many miles on your MKS?  Z

just over 96,000 I just reset them during lunch. Drove it around for an hour with nothing. Will see what happens on the way home.

It could be your o2 sensors  or your (COP) needs to be changed out especially if original and depending on the current mileage and hopefully not your cat converter depending how quick the codes return or hopefully  NOT,here's a video on the PO420-430.  Z      https://www.youtube.com/watch?v=xLyytQD7njw   BTW just monitor it for any such codes on a daily basis.  Z

I'm no mechanic but I know enough to be dangerous and I we t to change b1s1 02 and it looks like the sway bar needs to be disconnected and rotated up to change it.

I took the splash shield off and then the right front wheel. 

What's the procedure for doing the b1s1 02?

Quote from: Ramairetransam on December 05, 2017, 08:53:00 PM
I'm no mechanic but I know enough to be dangerous and I we t to change b1s1 02 and it looks like the sway bar needs to be disconnected and rotated up to change it.

I took the splash shield off and then the right front wheel. 

What's the procedure for doing the b1s1 02?

Get it through the front passenger side wheel well and you've got a clear shot at it.  Removing the wheel liner gives you a little more room, but you shouldn't have to do that.  Nothing needs to be disconnected or dropped.  Just get an o2 sensor socket on it and disconnect the harness from up above. 

I was trying to do it with a 22mm open end wrench , but i guess ill fork out the money for the socket. The 3 other 02s are all easy as hell.

Quote from: Ramairetransam on December 06, 2017, 07:17:17 AM
I was trying to do it with a 22mm open end wrench , but i guess ill fork out the money for the socket. The 3 other 02s are all easy as hell.

Don't even attempt to get an o2 sensor off with an open end wrench unless you're using a snap on flank drive plus wrench.  And even then, it's a gamble.  You'll just end up spreading the wrench and rounding the bolt.  Heat it up to if you have to and use an o2 sensor socket.  Either buy some or rent it for free from an autozone.  You'll have it off easy. 

my bro has a 22 02 socket im going to borrow

Quote from: Ramairetransam on December 06, 2017, 02:40:17 PM
my bro has a 22 02 socket im going to borrow

It's all about having the right tools for the job.  Makes life a lot easier.