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#Installed rob tune ecu and codes 45 21 12

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 Post subject: Installed rob tune ecu and codes 45 21 12
PostPosted: Sun Oct 22, 2017 3:17 pm 
In Neutral
Joined: Sun Oct 04, 2009 3:19 am
Posts: 35
Hey guys I installed my robtune finally . It’s been years of dreaming of getting this far . Once the car is running it runs great but I am getting codes 12 21 45 code 12 is normal because the starter is wired to a hidden button i had a car stolen... but the codes 45 and 21 are new code 21 is coolant temp sensor and 45 is pressure sensor does it mean map? Anyway the car has a terrible time starting on a cold start it takes a couple minutes of trying . Once it’s running it runs great and on a warm start the cel goes away. So is there something I missed in the wiring convention ? I also did a coil over plug conversion at the same time . I didn’t mess with coolant temp wireing at all . And is code 45 the map sensor or boost control. It just says pressure sensor . I followed instructions from how to convert coil over plug thread viewtopic.php?f=19&t=53990 . It’s just weird that the coolant temp would fail at the same time as converting to robtune. Thanks for any help , also I just put it into d check mode and driving around the only code it flashes is 43 throttle switch . The coolant temp code and pressure sensor code do not flash.


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 Post subject: Re: Installed rob tune ecu and codes 45 21 12
PostPosted: Thu Apr 12, 2018 7:08 pm 
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Location: Houston, Tx
Did you end up getting this resolved or are you still having the problems?

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Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

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 Post subject: Re: Installed rob tune ecu and codes 45 21 12
PostPosted: Mon Apr 16, 2018 3:45 am 
In Neutral
Joined: Sat Apr 05, 2014 12:12 am
Posts: 44
Location: Denver-Front Range
Id like an update as well, I am literally dealing with those exact codes after my robtune install and a new swap.

Edit: I am not seeing 12... I am seeing 21 and 45.


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 Post subject: Re: Installed rob tune ecu and codes 45 21 12
PostPosted: Mon Apr 16, 2018 4:33 pm 
Third Gear
Joined: Thu May 03, 2012 6:24 am
Posts: 823
Location: Bonney Lake, WA
code 45 is your map sensor.
maybe they were stored codes in the ecu?

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'91 Mica White SS - R.I.P.
'88 White RX Turbo sedan - SOLD
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 Post subject: Re: Installed rob tune ecu and codes 45 21 12
PostPosted: Mon Apr 16, 2018 7:15 pm 
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Location: Des Moines, Wa
Josh usually advises to start with the lowest number code and fix that first.

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 Post subject: Re: Installed rob tune ecu and codes 45 21 12
PostPosted: Sat Apr 21, 2018 4:51 pm 
In Neutral
Joined: Sat Apr 05, 2014 12:12 am
Posts: 44
Location: Denver-Front Range
Isnt the map sensor bypassed with the rob tune? And im going to be adressing the temp sensor, its just a pain becauuse i just finished the build did intial start up and now i have to break it down again...

Also if the radiator fans cycle during system check does that signal the sensor is actually good and its a wiring issue?

Will i damage anything if i continue engine break in with a bad coolant sensor (fans running constantly) and a map sensor code?


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 Post subject: Re: Installed rob tune ecu and codes 45 21 12
PostPosted: Mon Apr 23, 2018 6:42 pm 
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Location: Houston, Tx
When the ECU is in D-Check mode the fans will cycle. This allows you to test/check the relays. If the fans are cycling all that's telling you is the ECU is telling the fans to turn on and off, the wiring is good, the relays are working, and the fans are working.

With a bad coolant temp sensor you could be running richer or leaner. I would assume the default would be richer, which isn't necessarily better. I'd suggest starting with the coolant temp sensor and go from there.

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Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

If you need to get a hold of me please email me rather then pm


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 Post subject: Re: Installed rob tune ecu and codes 45 21 12
PostPosted: Wed May 16, 2018 5:21 am 
Third Gear
Joined: Sun Aug 06, 2006 6:25 am
Posts: 716
Location: Littleton, CO
Did this get resolved? I'm getting 43 as well with the green connectors along with 22, and 51

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 Post subject: Re: Installed rob tune ecu and codes 45 21 12
PostPosted: Mon May 21, 2018 5:52 pm 
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Location: Houston, Tx
What do you get with just the black connectors?

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Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

If you need to get a hold of me please email me rather then pm


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 Post subject: Re: Installed rob tune ecu and codes 45 21 12
PostPosted: Mon May 21, 2018 6:35 pm 
Third Gear
Joined: Sun Aug 06, 2006 6:25 am
Posts: 716
Location: Littleton, CO
I'm getting nothing now after repairing shielded knock sensor connector

_________________
1993 Legacy Turbo Sedan SadPanda
1994 Legacy Turbo Wagon (Aspen)--SOLD
1990 2.2l Legacy--RIP
Keeping the Legacy's Legacy

"Straight roads are for fast cars. turning roads are for fast drivers"

Official Subaru Ambassador


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 Post subject: Re: Installed rob tune ecu and codes 45 21 12
PostPosted: Tue May 22, 2018 6:03 pm 
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Location: Houston, Tx
Ok, well that's good.

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Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

If you need to get a hold of me please email me rather then pm


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