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Old 05-28-2008, 03:14 PM   #1
Scooby Newbie
Member#: 180950
Join Date: May 2008
Default newbie doesnt know which forum to look in for code resets

Hi and thanks for reading;

I bought a 97 Outback (autimatic transmission) in nice shape but test drove it in the day time and later after purchase while driving at night there were no instrument lights. Found that the fuse was missing altogether and replaced that. While under the dash I noticed unplugged green male /female clip wires. This was above the gas pedal more or less. I plugged it together and the check engine light started blinking. I used my auto Xray to pull the codes ( finally a reason to use it ! ) and got the speed sensor malfuntion code P0500 and and something else called a neutal position inhibiton switch circuit fault P1121 ? Also a P1540 vehicle speed sensor 2 range/ performance. Can I pull the ECU to reset ? Is it straightforward job to replace speed sensors ?

thanks again

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Old 05-28-2008, 03:20 PM   #2
Scooby Specialist
Member#: 173002
Join Date: Feb 2008
Chapter/Region: NESIC
Location: New Hampshire
2002 WRX


those green connectors aren't supposed to be connected, they are the test connectors. your scan tool should also clear codes, clear them and see if they come back.
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Old 05-28-2008, 03:22 PM   #3
Calamity Jesus
Scooby Guru
Member#: 44501
Join Date: Oct 2003
Chapter/Region: NWIC
Location: Yeah, well, you know
that 's, like, your
alternate facts, man.


The green plugs are for diagnostics use only.. leave them unplugged. The CEL is supposed to blink when they're connected.

To reset the ECU, just unplug the battery, step on the brake pedal and reconnect the battery after a few minutes.

As long as your speedometer is working, I'd chalk the codes up to plugging the diagnostic connectors in. See what codes you get after you've reset the battery and left the green plugs disconnected.
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Old 05-28-2008, 03:29 PM   #4
Scooby Newbie
Member#: 180950
Join Date: May 2008
Default that worked

Thanks guys for a quick reply. It worked but I have to back to class I'll let you know how it went.

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