Code 42???

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subaruguy509
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Joined: Mon Jul 09, 2012 7:38 am
Location: Spokane, WA

Code 42???

Post by subaruguy509 »

I keep getting this trouble code, but don't know what it means. I reset the check engine light, but it comes back every once in a while.

42
"Idle switch Abnormal voltage input entered from idle switch Judges OFF operation"
Legacy777
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Re: Code 42???

Post by Legacy777 »

Welcome to the BBS.

The idle switch is built into the throttle position sensor (TPS). You can follow the instructions in this scan to check if the idle switch is adjusted properly. If not, you can readjust it. Or if it can't be adjusted properly or the code continues, you can try replacing the TPS with a used one.

http://www.main.experiencetherave.com/s ... sting3.jpg

Here are the previous two scans for the TPS

http://www.main.experiencetherave.com/s ... sting1.jpg
http://www.main.experiencetherave.com/s ... sting2.jpg
Josh

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1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT

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