OFT Code U0122.. Limp mode.. Help - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

cameronjones239 · 10-21-2015, 11:47 PM

So I went out to a car meet tonight, had a friend of mine drive my car since he has an FRS I'd give him an idea what the full bolt on + e85 was like. We got back, hung out of about half hour to an hour. Went to drive my car and about a 1/4 mile in I noticed my ABS and Stability light were stuck on. Turned the car off then back on, then ALL the lights came up, check engine, ABS, TC, basically everything right of the speedo. Tried to power on my OFT and nothing happened. Turned the car back on, no power steering, all the lights on and no OFT getting power. Unscrewed my gas cap and put it back in thinking it was something small.
This time when I started the car everything was normal, checked the code real quick and picked up a U0122 code. Cleared it and went to pull out of the parking spot it all went to crap again. Limp mode, no power steering etc.
Checked as much of the wire harness as I could see, unplugged the battery for about 10-15 minutes and still same results.
I don't think my buddy would've done anything abusive to the car or mistreated it in any way, he's a pretty genuine guy. Has anyone else run into this as far as a cause or know of a fix?

OFT stage 2 e85
openflash header
evo gt catback

edit: currently leaving the battery unplugged for the next few hours to see if it can help clear something up
Edit 8-26-17 I didn't realize I never updated the post for the fix. I was recommended to take the wires off the battery and touch them together to create some kind of electronic discharge. As a last resort before taking it to the dealer I gave it a try. Took the cables off, touched them together. Put them back on the battery and everything has been normal since.

jawn · 10-21-2015, 11:55 PM

Have you checked your fuses? I believe there's one for the VDC.

cameronjones239 · 10-22-2015, 12:18 AM

I'm not seeing it a fuse for that anywhere.. I can't find hardly any info on anyone else running into this. It's pretty strange. @steve99

jawn · 10-22-2015, 12:25 AM

Should be MPX-B. Someone correct me if I'm wrong. It's highlighted.

cameronjones239 · 10-22-2015, 12:31 AM

Pulled that fuse and it's in good shape, restarted the car and still same issues.

cameronjones239 · 10-22-2015, 12:33 AM

Not that it really helps... but

jawn · 10-22-2015, 12:49 AM

Yeah, I'm out of ideas.

http://www.ft86club.com/forums/showthread.php?p=1303656

Someone else who had this issue had it eventually go away by itself. So, here's hoping?

RustySocket · 10-22-2015, 12:54 AM

I'm just tossing this out there as a possible suggestion:

What kind of shape is your battery in? If you have a way to check the voltage and also make sure it's charging when the engine is running. you should be seeing 13.8-14.2 volts if your alternator is doing it's job. Dying batteries can cause all kinds of weird things to happen.

steve99 · 10-22-2015, 12:55 AM

U0122 is lost communication with dynamics control module (stability)

do you have any obd devices plugged into obd port

check battery volts

when you remove battery power , press brake pedal to bleed off any residual power to make sure everything get reset.

It sound like it might actually be a fault with the vehicle stability control or connections.

run the tank out stock tune , back to dealer

cameronjones239 · 10-22-2015, 01:46 AM

You could be right on that battery, I'll check the voltage first thing in the morning and report back

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cameronjones239 · 10-22-2015, 01:55 AM

I did have to jump it a few weeks ago before a big cruise. She's been sitting a lot since then with no trickle charger. When I got out of the car to show him the OFT after his cruise I left my ignition on. He took me for a ride in the GTR then my buddy offered an M3 ride shortly after. So it had to be on for a solid hour. Thanks for the quick replies, good excuse for a lightweight battery if this one won't revive

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RustySocket · 10-22-2015, 02:45 AM

I hope it's something simple like that for you

86joe · 01-10-2017, 10:12 PM

Yes. Lost communication with vehicle dynamics control module is the system that is responsible for the electronic driver assists like ABS. This happens when something interferes with a sensor of some sort. For instance it can happen when someone goes off track into grass while tracking, and its happened to me before when I overstretched and broke an ABS Sensor Wire while changing out coil overs. 90% chance its a wheel speed sensor or something.

86Frz · 04-02-2020, 06:15 PM

Hey I’m having the same problem I wanted to know what exactly did you do to fix it ?

10-22-2015, 12:25 AM	#4
jawn Senior Member Join Date: Jun 2015 Drives: 2015 CWP BRZ Limited Location: NOVA Posts: 2,800 Thanks: 1,801 Thanked 3,946 Times in 1,757 Posts Mentioned: 105 Post(s) Tagged: 7 Thread(s)	Should be MPX-B. Someone correct me if I'm wrong. It's highlighted. Attached Images

04-02-2020, 06:15 PM	#14
86Frz Junior Member Join Date: Dec 2019 Drives: Brz Location: Riverside Posts: 1 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Lost communication Hey I’m having the same problem I wanted to know what exactly did you do to fix it ?

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10-21-2015, 11:55 PM	#2
jawn Senior Member Join Date: Jun 2015 Drives: 2015 CWP BRZ Limited Location: NOVA Posts: 2,800 Thanks: 1,801 Thanked 3,946 Times in 1,757 Posts Mentioned: 105 Post(s) Tagged: 7 Thread(s)	Have you checked your fuses? I believe there's one for the VDC.

10-22-2015, 12:49 AM	#7
jawn Senior Member Join Date: Jun 2015 Drives: 2015 CWP BRZ Limited Location: NOVA Posts: 2,800 Thanks: 1,801 Thanked 3,946 Times in 1,757 Posts Mentioned: 105 Post(s) Tagged: 7 Thread(s)	Yeah, I'm out of ideas. http://www.ft86club.com/forums/showthread.php?p=1303656 Someone else who had this issue had it eventually go away by itself. So, here's hoping?

10-22-2015, 12:54 AM	#8
RustySocket Slow Learner Join Date: Jul 2015 Drives: 15 Halo FRS Location: Puget Sound Posts: 206 Thanks: 147 Thanked 110 Times in 55 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	I'm just tossing this out there as a possible suggestion: What kind of shape is your battery in? If you have a way to check the voltage and also make sure it's charging when the engine is running. you should be seeing 13.8-14.2 volts if your alternator is doing it's job. Dying batteries can cause all kinds of weird things to happen.

10-22-2015, 12:55 AM	#9
steve99 Banned Join Date: Dec 2013 Drives: FT86 Location: Australia Posts: 7,998 Thanks: 1,035 Thanked 4,987 Times in 2,981 Posts Mentioned: 598 Post(s) Tagged: 2 Thread(s)	U0122 is lost communication with dynamics control module (stability) do you have any obd devices plugged into obd port check battery volts when you remove battery power , press brake pedal to bleed off any residual power to make sure everything get reset. It sound like it might actually be a fault with the vehicle stability control or connections. run the tank out stock tune , back to dealer

10-22-2015, 02:45 AM	#12
RustySocket Slow Learner Join Date: Jul 2015 Drives: 15 Halo FRS Location: Puget Sound Posts: 206 Thanks: 147 Thanked 110 Times in 55 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	I hope it's something simple like that for you

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