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P0328 code after air pump delete
P0328 code after air pump delete
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Old 05-02-19, 12:23 PM   #1
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Default P0328 code after air pump delete

I just had my local shop complete an air pump delete on my 2012 STi. Car seems to run fine, but now it's giving me a knock sensor P0328 code. Feedback knock on the goes straight to -5.0 under 30%-40% throttle, DAM remains at 1.0 and fine knock learn is 0.0

Any ideas? Also, if someone could let me know the location of this sensor that would be super helpful.

Thanks!
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Old 05-02-19, 01:15 PM   #2
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Default Re: P0328 code after air pump delete

Also wanted to add that I had spark plugs replaced at the same time with new OEM plugs
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Old 05-02-19, 02:04 PM   #3
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Default Re: P0328 code after air pump delete

Sounds like the knock sensor is unplugged...
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Old 05-02-19, 02:54 PM   #4
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Default Re: P0328 code after air pump delete

curious did they reinstall the baro sensor? dunno if lack of baro sensor would lead to that code or not.
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Old 05-02-19, 05:49 PM   #5
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Default Re: P0328 code after air pump delete

Quote:
Originally Posted by crick0234 View Post
curious did they reinstall the baro sensor? dunno if lack of baro sensor would lead to that code or not.
I asked him to leave the valve with the baro sensor intact, everything else is removed. I'm running a map with all of the air pump codes disabled

Not sure if this is significant or not, but the feedback knock goes to -5.0 and ONLY -5.0 like an on-off switch. It doesn't change from that value even at WOT.

I can feather the throttle lightly through the RPM range without getting a knock reading, but when the car gets under load thats when I see the knock.
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Old 05-07-19, 05:13 AM   #6
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Default Re: P0328 code after air pump delete

*Update* turns out the knock sensor had been damaged during the air pump removal, the inner wire was exposed. Had the sensor replaced, all is good

Thanks for the help!
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