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Knock sensor code on 2.5 to 2.2 conversion
Posted 03 February 2013 - 10:20 PM
My most recent was to swap a 97 2.2 impreza outback engine into my 97 legacy outback.
After both swaps I have a check engine light indicating "knock sensor". Both were 2.5 to 2.2 conversions. I find it odd that both engines might have came with a bad knock sensor. Is this common? Did I miss something that I needed to do on my swap to prevent the CEL?
Both engines seem to run fine. I am sure there was no CEL on in the 97 Legacy outback before the swap.
Posted 03 February 2013 - 11:05 PM
I would first make sure the sensor is plugged in and the pins didnt back out of the connector. Next double check the large 16 and 12 pin connectors on the bellhousing. Make sure theyre plugged in tight and the pins are all connected.
Posted 04 February 2013 - 01:02 AM
Posted 04 February 2013 - 11:46 AM
Suggest you replace the knock sensor, be careful not to tighten the bolt very tight, or you will crack the plastic casing around the knock sensor.
Posted 04 February 2013 - 10:30 PM
also if it's ever been messed with it's not hard for the pin to pull right out of the connector and the connector to be compromised/not seating right.
there's a very specific technique to installing them, directions are posted on threads here. connector is supposed to be installed at a certain angle and torqued properly. i've never seen that alone cause a check engine light though but if everything else checks out...
Posted 06 February 2013 - 10:13 PM
Posted 06 February 2013 - 11:30 PM
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