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Old 04-02-2018, 09:31 AM   #26
sth36
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Looks like the symptoms of either part failing are roughly the same making it hard to diagnose the broken element without first replacing one or the other. It's been roughly 3 weeks of bad weather here in the northeast and I haven't seen a CEL once since I replaced the harness.
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Old 04-02-2018, 10:59 AM   #27
anjuna
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why not just get the voltage input from somewhere else?
oh wait, that would mean you wanna-be-kiddie-ass-car-modders wouldn't know what to do.
splicing, wiring, soldering, etc.
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Old 04-02-2018, 11:56 AM   #28
ericdet
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Quote:
Originally Posted by anjuna View Post
why not just get the voltage input from somewhere else?
oh wait, that would mean you wanna-be-kiddie-ass-car-modders wouldn't know what to do.
splicing, wiring, soldering, etc.
Because a reputable company is backing the hardware and will replace it no questions asked.

The first avenue for anyone should be that.
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Old 04-02-2018, 11:59 AM   #29
anjuna
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Quote:
Originally Posted by ericdet View Post
Because a reputable company is backing the hardware and will replace it no questions asked.

The first avenue for anyone should be that.
I guess I just enjoy a working car more, even if it requires a little bit of work, than throwing money away at a "plug and pay" solution.
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Old 04-02-2018, 02:53 PM   #30
sth36
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Eric nailed it. Why waste money on new tools or know-how (plus opportunity cost of the time to learn and troubleshoot the problem) when the company stands by their product and replaced it at no cost to me (the cherry on top is that replacing the harness took about 20 min from start to finish)?

That said, it seems like quite a few people have had issues. What would be the process you would go through to get this sort of thing sorted?
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Old 04-02-2018, 04:32 PM   #31
anjuna
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Quote:
Originally Posted by sth36 View Post
What would be the process you would go through to get this sort of thing sorted?
1. fix car
2. drive it

it would literally take me less time to just fix it myself than to write an entire post about it.

My idea of a
Quote:
Originally Posted by ericdet View Post
a reputable company
would be one that doesn't sell stuff that
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Originally Posted by sth36 View Post
a few people have had issues
with.
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Old 09-25-2018, 11:10 AM   #32
sunnyhaibin
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Update on the post I had earlier:

Contacted COBB about the issue. After they validated my proof of purchases, they sent out the new FlexFuel harness + Ethanol Sensor. After replacing with the new hardware, the issue has been fixed and the code never came back. Parts arrived within 3 days from COBB.
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Old 01-05-2019, 12:49 AM   #33
HiImBen
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Just got this CEL too. Was able to clear the code after reflash my tune but after a few months the CEL came back and I wasn't able to fix the CEL. Contacted Cobb and they are sending me the whole kit to replace.
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Old 01-08-2019, 03:31 PM   #34
subiedoobiedo818
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I am having issues with this as well. Anyone else get this code in conjunction with:

1) Weak cold starts (car takes abnormal amount of cranks to turn over, then idles poorly for a few seconds before returning to normal)
2) Airbag light on dash
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Old 03-11-2019, 08:39 PM   #35
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been dealing with a cobb1 check light for the winter season as well. after reading this thread I chalked it up to my starter motor dragging on. well I replaced the starter motor and the vehicle starts normally now, but I did get the cobb1 check light to come on. its in an 05' sti. the check light never comes on while driving, only right after a start. I can usually clear the code right away or within a few tries of the ecu reset. gonna send video off the light coming on to cobb since I don't think there is a way to datalog while starting (cranking). any other info needed in helping troubleshoot this issue? same tune on the car since last aprilish with the flex fuel. no changes to the car at all as far as mods, trips to the dealer or any service then oils changes I do myself.
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Old 05-01-2019, 12:42 PM   #36
corlon
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issue resolved for me. cobb sent me a new main unit and wiring harness. check light has not come back on. thanks cobb!!!
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Old 05-02-2019, 10:12 AM   #37
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Quote:
Originally Posted by subiedoobiedo818 View Post
I am having issues with this as well. Anyone else get this code in conjunction with:

1) Weak cold starts (car takes abnormal amount of cranks to turn over, then idles poorly for a few seconds before returning to normal)
Check your battery. If it is the weak 390 CCA subaru unit and more than two years old it is probably time to replace it.
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Old 06-07-2019, 03:35 AM   #38
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Default Cobb1 code

Cobb has sent me through hoops trying to get this thing warrantied. Wanted me to go through all connections, clean ethanol sensor, supply all the documentation, 3 data logs, Told me it could be improperly installed even though BrenTuning installed it. Everything looked good so I was getting frustrated. Well anyway I gave it a last effort spraying out the ethanol sensor connector and harness with contact cleaner even though all looked mint. What do you know seems to be working good now. Before the code was intermittent and recently couldnít even get it to clear. Crazy that I had to do this in less than 6 months. Sensor is located down low behind battery and I have factory hood. Wish you best of luck and Iím not fully celebrating just yet.
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Old 06-07-2019, 06:12 PM   #39
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When you say contact cleaner do you mean maf cleaner? Have had the kit for about 2 years now 34,000 miles and just a couple weeks ago started having issues. Reset the cel and drove 1,000 miles and it came back. So think disconnecting all connections and spraying maf cleaner helped?
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Old 06-08-2019, 10:25 AM   #40
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Cant hurt to try no?
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Old 06-15-2019, 05:01 PM   #41
Dwbarrett7
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Quote:
Originally Posted by L.P. View Post
When you say contact cleaner do you mean maf cleaner? Have had the kit for about 2 years now 34,000 miles and just a couple weeks ago started having issues. Reset the cel and drove 1,000 miles and it came back. So think disconnecting all connections and spraying maf cleaner helped?
Yes I used Maf cleaner. I didnít have contact cleaner laying around. Itís all the same though. Probably just spray out the harness for the ethanol sensor and the connector it attaches too. Code is for low voltage to ethanol sensor so I would assume just that one. Iím a plumber though and not a mechanic so take it with a grain of salt. If that doesnít work I would assume itís a bad sensor or the ďbrainĒ on the kit.

Last edited by Dwbarrett7; 06-15-2019 at 08:30 PM.
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Old 06-20-2019, 01:35 PM   #42
4warnedtuning
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I am experiencing the same problem. I thought it was the sensor so I ordered one, but I found the harness down by the exhaust had actually been cut... so after repair fingers were crossed that the light would be off, no such luck. same code present.
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Old 06-25-2019, 11:47 PM   #43
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Just had this pop up and i have a track day on July 13th. Effing great, just E-mailed Cobb but i don't think i can find my proof of purchase since it's been like a year..... great...
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Old 06-30-2019, 01:47 PM   #44
L.P.
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Cleaned my contacts with contact cleaner. Worked for about 3000 miles give or take and today it popped back on. Cobb wants me to get a log with it occuring but it only happens if it does happen on a warm start. After start it takes a few seconds and pops up. Ethanol raw shows 0.0. Frustrating.
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Old 07-01-2019, 08:42 AM   #45
violentleaf
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I got the COBB1 code and a CEL this weekend at an autocross in 100deg heat after a few runs. I was thinking the controller overheated and just stopped functioning. TGV left was reading 0.0v.

It started working again after the 40 minute drive home though. Anyone else have a similar experience?
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Old 07-01-2019, 10:46 AM   #46
silverscooby
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It's a pretty common problem I have seen here and on other boards as well as locally. They are fairly sensitive to heat. A lot of people have had luck creating their own heat shielding and mounting everything as far away from the heat sources as possible.
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Old 07-01-2019, 11:19 AM   #47
violentleaf
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Quote:
Originally Posted by silverscooby View Post
It's a pretty common problem I have seen here and on other boards as well as locally. They are fairly sensitive to heat. A lot of people have had luck creating their own heat shielding and mounting everything as far away from the heat sources as possible.
Can you point me in the direction of others who have had or solved the overheating problem?

I'm thinking I'll have to bring a water sprayer to the next event to cool the intercooler and the flex control unit.
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Old 07-01-2019, 11:54 AM   #48
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Most of what I have seen is on local cars where the owners and shop owners have told me they remedied problems with the Cobb kit by adding heat shielding.

A buddy's flex fuel kit for his GTR (Got Boost kit from PRL) came with its own heat shield. (Different type of car but the parts are basically the same - sensor and lines with vehicle specific connectors)

https://prlmotorsports.com/gotboostp...kitr35gtr.aspx

When I'm bored I will look around on here and link as well.

I will be going with Cobb's kit soon and will definitely be making a heat shield for it.
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Old 07-01-2019, 01:47 PM   #49
violentleaf
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Excellent thanks! I'll probably add a thermal pad to the location the controller bolts onto. And I'd really like to see what you come up with
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Old 07-08-2019, 02:09 PM   #50
Dwbarrett7
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Default Little update

Quote:
Originally Posted by L.P. View Post
Cleaned my contacts with contact cleaner. Worked for about 3000 miles give or take and today it popped back on. Cobb wants me to get a log with it occuring but it only happens if it does happen on a warm start. After start it takes a few seconds and pops up. Ethanol raw shows 0.0. Frustrating.
So same thing happened to me after cleaning the ethanol sensor connectors. Went away for a while but eventually the Cobb1 code reappeared. Along with that code ethanol final was spiking up and down roughly 15%. I contacted Cobb over and over again and finally received a complete kit replacement in the mail a few days ago. All is well now with the new kit installed. Hopefully this is not a reoccurring problem :/. I also will do some research on this heat shield theory to prevent from happening again.
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