kh0432 Posted November 18, 2004 Share Posted November 18, 2004 I replaced the knock sensor on my 91 Legacy. I disconnected the battery for an hour to clear the codes and drove the car for 30 minutes after installing the sensor. I still have a code 22. Is this because the engine hasn't had a pinging problem yet to send a signal to the pcm? Thanks, Keith Quote Link to comment Share on other sites More sharing options...
lmdew Posted November 19, 2004 Share Posted November 19, 2004 Did you check the knock coil resistance? It might be a bad coil. The engine does not need to ping for the ecu to see the sensor. Wiring? Quote Link to comment Share on other sites More sharing options...
sea#3 Posted November 19, 2004 Share Posted November 19, 2004 When you replace the knock sensor did you clean the block where it seats . It needs a good contact to the block ,also it should be torqued to 18 lbs/ft SEA#3 Quote Link to comment Share on other sites More sharing options...
Legacy777 Posted November 19, 2004 Share Posted November 19, 2004 Try clearing the codes using the connector method outlined on my site. Sometimes the battery method doesn't work. Quote Link to comment Share on other sites More sharing options...
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