Jump to content

Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse

- - - - -

po325 knock sensor code

  • Please log in to reply
2 replies to this topic

#1 dp213


    Subaru Fanatic!

  • Members
  • 473 posts
  • Stanwood, WA

Posted 06 May 2014 - 10:37 AM

I just put a 97 2.2 from a legacy in my 98 outback. I have a knock sensor code that wasn't there when the motor was in the legacy. Any thoughts.

Also when I am driving and give it gas I hear a whistle sound now.


#2 Fairtax4me



  • Members
  • 13,034 posts
  • Charlottesburg, VA

Posted 06 May 2014 - 11:58 AM

Knock sensor codes are usually because of corrosion on the sensor or the housing of the sensor is split and the element inside has corroded.
Easy to check, and only about $15 on eBay for a replacement.

Is the whistle from the front or back? If you have the big box intake make sure the halves are fitted together properly.
Alot of these have a whistle sound from the muffler. I'm not sure if anyone really knows what causes it. My 96 does it, my girlfriends 95 does it. I've heard countless others make the same sound. My old 95 wagon had three different pitches depending on engine speed and throttle opening.

#3 johnceggleston


    Lite Master of the Subaru

  • Members
  • 6,712 posts
  • Virginia

Posted 06 May 2014 - 12:57 PM

Also when I am driving and give it gas I hear a whistle sound now.


a leak,

exhaust or intake.

have someone accelerate the engine while you listen.

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users