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Old 07-30-2014, 07:15 PM   #1
Tommyx666xBMX
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Location: Boston, MA
Vehicle:
'04 WRX Wagon
Mitsu Graphite Gray

Default OBD2 Not working/other stuff[HELP ME]

I'll make this fairly simple, I know there's tons of threads addressing each of these codes individually, but they're all definitely acting together and that's what I'm having trouble figuring out.

Basically, woke up one morning to a no good starter, the little wire jumping between modules corroded clean in half. Flash forward two days, I've installed a new one and am now displaying a CEL. So, I do what any subaru kid would do, pull his accessport out of his glove box to run the codes, but for some reason the accessport wouldn't fully turn on, but rather the screen would flicker as if it were getting power and losing it over and over.
Anyways, I checked back later that night to see if I could pull a code, and this time the accessport would get power for longer spurts of time, one of them being JUST enough to get the three codes, being as follows:

P0031: HO2S Heater Control Circuit Low) Bank 1 Sensor 1
P0037: HO2S Heater Control Circuit Low) Bank 1 Sensor 2
P1560: Back-Up Voltage Circuit Malfunction

Whatever, I had no clue what this meant and it didn't make the car drive different so I put it on the back burner for a few months but now may be selling my car and need to remove said light.
But at this point, the obd2 is getting no power whatsoever for any code readers. So far I've checked the harness near the rear O2S, Fuses under the hood (specifically SB5), and fuses on the small panel near my clutch knee.

EXTRA RANDOM OCCURANCE: Since my battery was disconnected while doing other work, my LC disabled. Long story short I bounced off my redline by accident and what happens? The CEL turns off and the obd2 works perfect and detects nothing for ~25min. I've also noticed the car seems to be running rich since all of this began, possibly reverted to a base map somewhere?

PLEASE HELP I'M LOST. FREE COOKIES TO WHOEVER SOLVES MY ISSUE AND HATS OFF TO ANYONE WHO CAN SUPPLY ME WITH TROUBLESHOOTING ADVICE

(To moderators, I was unsure if this fell under 2.0 Turbo or electrical or what, please move accordingly if this is wrong.)
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Old 07-30-2014, 11:56 PM   #2
Tommyx666xBMX
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Member#: 341821
Join Date: Dec 2012
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Vehicle:
'04 WRX Wagon
Mitsu Graphite Gray

Default

Nobody knows what this could be?


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Old 07-31-2014, 02:18 PM   #3
Tommyx666xBMX
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Mitsu Graphite Gray

Default

Somebody at least point me towards which fuses to look at?


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Old 07-31-2014, 05:02 PM   #4
Seahawk
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Location: Wilmington, NC
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1994 Impreza
w/ 03 WRX Swap

Default

Check the connection at the OBD2 port. They are troublesome on GD WRXs and many stories of them not working. I had trouble with mine in my 03 and sometimes had to "work the angle" to get it to connect to my code reader.
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Old 07-31-2014, 05:17 PM   #5
Tommyx666xBMX
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Quote:
Originally Posted by Seahawk View Post
Check the connection at the OBD2 port. They are troublesome on GD WRXs and many stories of them not working. I had trouble with mine in my 03 and sometimes had to "work the angle" to get it to connect to my code reader.

Doesn't make a difference. Not even a small flicker of power at any point.


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Old 07-31-2014, 05:19 PM   #6
Seahawk
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Join Date: Oct 2004
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Location: Wilmington, NC
Vehicle:
1994 Impreza
w/ 03 WRX Swap

Default

Have you confirmed power and ground at the port with a multimeter?
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Old 08-01-2014, 02:09 PM   #7
Tommyx666xBMX
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Join Date: Dec 2012
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Location: Boston, MA
Vehicle:
'04 WRX Wagon
Mitsu Graphite Gray

Default

Quote:
Originally Posted by Seahawk View Post
Have you confirmed power and ground at the port with a multimeter?

I have not. Which pins am I checking?


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