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  #1  
Old 09-14-2009, 07:09 PM
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Knock Sensor - Code #22

I've been fighting an issue of a rough idle after warm up. I jumped the ECU and it told me that it was the driver side O2 sensor. I replaced it and reset the ECU. When I test drove the car the idle was still rough (less so than before, admittedly) and it threw another CEL during the test drive. I jumped it again and now its reading fault code 22, which according to the manual is "knock sensor or circuit". First of all, what does this mean? Which knock sensor is it? Driver side or passenger side?

So, I assume I have to replace the knock sensors. I searched on the boards and I could not find a "step by step". I don't even know where these sensors are, I do know that I will most likely have to pull the intake plenium and alternator.

Does anyone have anything or know some resource that I can use to replace these sensors? Otherwise its $600 at the dealer with a Subie mechanic that is vaguely familiar with the SVX

Any help would be greatly appreciated!!

Humblest Regards,

Yoshi
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Mods: K&N Drop In Filter, Sony aftermarket CD/MP3 Stereo and Speakers, Sumitomo HTR+ Tires


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  #2  
Old 09-14-2009, 07:18 PM
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Re: Knock Sensor - Code #22

hi code 22 R/S sensor ,22090aa031 ,$62 at the web site i checked ,just remove the alt and its between cylinders 1&3
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  #3  
Old 09-14-2009, 07:22 PM
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Re: Knock Sensor - Code #22

I believe 2, one for each bank. #22 is the passenger bank one. From what ive seen they attach with only one bolt, and with some decent tools, I doubt having to pull the intake manifold is necessary. Im sure you can find a junkyard one in decent condition, or check in the "parts for sale" section.
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  #4  
Old 09-14-2009, 07:22 PM
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Re: Knock Sensor - Code #22

i miss typed the part number its 22060aa031
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  #5  
Old 09-14-2009, 07:25 PM
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Re: Knock Sensor - Code #22

Quote:
Originally Posted by trophy956 View Post
i miss typed the part number its 22060aa031
"Edit" helps unless you are one of those guys who likes to run up your postcount....

Postcount +1 !!
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  #6  
Old 09-14-2009, 10:14 PM
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Re: Knock Sensor - Code #22

Thanks guys,

I think I will get a new one since I would imagine that anything that has made its way to the bone yard in the form of an SVX is probably in pretty bad shape. I think someone said that he was able to find them for $50 at Autozone. Chris, I can always count on you for some help!! What exactly do you mean by "decent tools"? I have some decent tools but mostly crappy ones since I am a cheapskate

The other problem is, I don't even know what the hell I am looking for! Does anyone have a picture of where the knock sensors are? Or what they are supposed to look like on the SVX engine? Is there a resource that I can go to?

Many Thanks,

Yoshi
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[B]1995 SVX L AWD - Original Owner
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Mods: K&N Drop In Filter, Sony aftermarket CD/MP3 Stereo and Speakers, Sumitomo HTR+ Tires


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Last edited by ykobayashi; 09-14-2009 at 10:16 PM.
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  #7  
Old 09-14-2009, 10:29 PM
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Re: Knock Sensor - Code #22

Quote:
Originally Posted by ykobayashi View Post
Thanks guys,

I think I will get a new one since I would imagine that anything that has made its way to the bone yard in the form of an SVX is probably in pretty bad shape. I think someone said that he was able to find them for $50 at Autozone. Chris, I can always count on you for some help!! What exactly do you mean by "decent tools"? I have some decent tools but mostly crappy ones since I am a cheapskate

The other problem is, I don't even know what the hell I am looking for! Does anyone have a picture of where the knock sensors are? Or what they are supposed to look like on the SVX engine? Is there a resource that I can go to?

Many Thanks,

Yoshi
Download the service manual Here. Open the .pdf titled "electrical component locator" and proceed to page 39. It has an illustration of both of the knock sensors and their position on the top of the engine. You may need a socket u-joint, stubby wrench, or a crows foot.... I dont have my car here right now to look. They are basically black knobs with a line to them, one bolt on top securing them to the engine. Hope this helps!
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  #8  
Old 09-14-2009, 10:42 PM
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Re: Knock Sensor - Code #22

Chris,

U da man! Thank you!

I'll give it a try later this week (takes a few days to build up my courage) or when I can find time between work and family. I'll let you know how it goes!

Thanks again!!!!

Yoshi
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Mods: K&N Drop In Filter, Sony aftermarket CD/MP3 Stereo and Speakers, Sumitomo HTR+ Tires


2004 Mazda 6S 5-door - Steel Grey - 5 speed manual transmission - Daily Driver

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  #9  
Old 09-14-2009, 10:51 PM
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Re: Knock Sensor - Code #22

Quote:
Originally Posted by ykobayashi View Post
Chris,

U da man! Thank you!

I'll give it a try later this week (takes a few days to build up my courage) or when I can find time between work and family. I'll let you know how it goes!

Thanks again!!!!

Yoshi
No problem, I am the man, thank you, thank you!!

<Applause dies down gradually, crowd sits after lengthy standing ovation>

Cool well keep us posted, I dont think it will be that bad though
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  #10  
Old 09-15-2009, 05:10 AM
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Re: Knock Sensor - Code #22

I was looking at this sensor yesterday...

I wasn't throwing a code yet but after taking my intake manifold off I did notice my knock sensor was cracked and brittle looking. I don't know if someone over tightened it or if it was also heat related. I am definitely replacing it while it is easy access though. If you still need it I can get some photos without the manifold in place if you think it would help. Should be a straight forward replacement though.
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  #11  
Old 09-16-2009, 01:00 AM
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Re: Knock Sensor - Code #22

Replaced mine a few months back... This was pretty helpful.

http://www.subaru-svx.net/forum/show...t=knock+sensor
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  #12  
Old 09-16-2009, 04:40 PM
gbianchi gbianchi is offline
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Re: Knock Sensor - Code #22

Hello there all just wanted to share my knock sensor replacement story with y'all, all went well thanks to info found here, no I did not remove the intake just the alt and ac comp, I have small hands. To get the left side unplugged I felt like a surgeon, I used a peice of hanger as a holding tool for the wire harness, another piece of hanger to hold the connector and hemostat to unplug, shot the plug with WD40. WOW patience tester alert. After that all went well, I would say to anyone that does this to ty a peice of wire/string to the OLD ksensor so you can drag it out and ty up the new one and drag it back in there. Once you get going all this will acualy make more sence. So no more cel and on to more fun things like wheel bearing pounding, err I mean fenessing........................................G
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  #13  
Old 09-16-2009, 06:32 PM
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Re: Knock Sensor - Code #22

You do know it's a $10,000 fine for releasing freeon into the air if you disconnected the lines to move the a/c? It needs to be properly recycled by a machine.
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94' Barcelona Red w/ Tricoat black 2-tone AWD Ls -Sold
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92' Pearl White/black top LS-L-SOLD
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  #14  
Old 09-17-2009, 03:18 PM
gbianchi gbianchi is offline
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Re: Knock Sensor - Code #22

Bad wording on my part, should have said "moved the ac comp outa the way" my ac works wonderfully, I wouldn't remove a charged a/c comp.............G
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I thimk ther4 I an, what? huh!
03 Baja. 05 Baja turbo
92legacywagon"snow"
94legacywagon"whinny"
84Brat"huey"
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  #15  
Old 09-17-2009, 05:20 PM
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Re: Knock Sensor - Code #22

I figured that but just sayin.
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94' Barcelona Red w/ Tricoat black 2-tone AWD Ls -Sold
Mods:AWD conversion/4.44 swap by Budfreak, Custom red interior lights, Custom Satin black dash, Power mode switch, Cold air intake, Permecool tranny filter,Sony xplode 10" sub, Sony xplode 1000w amp, Blitz in-line driver, DDM Tuning 6000k HID's, New paint job/body work by me, 97' Grill, QC shift kit, 17'' MB Motoring rims, 15&20 min mod, front & rear urethane swaybar bushings, Custom fiberglass sub box, Custom red led a/c control unit, perrin lightweight crank pulley, Black wrinkle finish powdercoated intake manifold w/ clear hoses , 02' outback heated/power black leather seats
Soon to come:Fiberglass hood, upholster ALL suede to black leather
Past subies:

92' Pearl White/black top LS-L-SOLD
96' Legacy Outback-TOTALED
99' Legacy Outback Limited 30th anniversary edition-TOTALED
98' Forester L -Totaled
Other toys:
99' Forester S -WRX brake upgrade, soon an 04 wrx motor swap
06' B9 Tribeca-Stock
1982' Yamaha xj650 Maxim
Mods:
work in progress
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