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Old 12-27-2001, 11:32 PM   #1
GusS
Scooby Newbie
 
Member#: 12879
Join Date: Dec 2001
Location: Montreal, Canada
Vehicle:
1992 Legacy L Wagon
5spd, AWD, White

Default Trouble codes 22 & 42 on a BF Legacy

Hi,
I'm getting the following trouble codes:

22: Knock sensor - Abnormal voltage produced in knock sensor monitor circuit. Sets in regular fuel map and retards ignition timing.

42: Idle switch - Abnormal voltage input entered from idle switch. Judges OFF operation.
Around how much are the parts needed and can this job be performed by a novice?
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Old 12-28-2001, 12:38 AM   #2
iceman
Scooby Newbie
 
Member#: 1546
Join Date: May 2000
Location: New York
Vehicle:
95 Legacy L
Silver

Default

I'm a novice too, but you can try a ECU reset. I don't think it will help, but you can't lose anything. However it sounds like you need a new Knock sensor.
Hope this helps,
Ice

Last edited by iceman; 12-28-2001 at 01:11 AM.
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Old 12-28-2001, 07:20 AM   #3
GusS
Scooby Newbie
 
Member#: 12879
Join Date: Dec 2001
Location: Montreal, Canada
Vehicle:
1992 Legacy L Wagon
5spd, AWD, White

Default

Iceman these are new.. I reset it about 2 weeks ago when I had a canister purge solenoid code. I replaced the solenoid and now I have this.
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Old 12-28-2001, 02:56 PM   #4
subysouth
Scooby Guru
 
Member#: 5039
Join Date: Mar 2001
Chapter/Region: South East
Location: Ocean Springs, MS
Vehicle:
2007 Outback XT
Grey 5-speed

Default hmmm

The idle sensor I have no experiencewith but the knock sensor I have replaced.
It is a relatively easy replacement with an extension and a u-joint on a socket wrench. Its beneath the intake manifold on top off the block almost directly under the throttle body.
Try this before you replace it: Remove the knock sensor and clean the base of it a well as the mating surface on the block with steel wool. This will sometimes remedy the problem.
Otherwise it needs to be replaced. I had to go to the dealer for the part (appr. $40.) HTH
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