I have a 1991 Legacy sedan with around 116,000 miles on it, and the check engine light recently came on. After hooking up the test connector, I was able to make the light flash DTC 22 at me, indicating, according to the repair manual, a problem with the knock sensor that could result in the car defaulting to 'fail-safe' timing mode. Now, it seems pretty clear that the first step would be to replace the knock sensor, but I don't really have time to do that this week, and it would be nice to keep the car in service for short trips to the store, etc. So, my question here is a three-parter:
1) Is there anything I should try before yanking the knock sensor?
2) Is it safe to drive?
3) This can't be an indication of engine knock, right? Or would this trouble code also manifest because of the beginnings of an engine knock?
I appreciate any ideas anyone might have....
-V