I have the check engine light on speradically. The car doesn't seem to drive much different when it is on, then when it turns off. Any idea what this could be?
Check the knock sensor.
The light comes on when you climb a hill, accelerate quickly or do anything that advances the timing a lot and the knock sensor doesn't hear the knocks (pinging). The engine timing is not retarded, so you get a misfire.
The computer turns off the CEL if it sees the car start and run with no misfire of this nature 4 times in a row.
493 views
Usually answered in minutes!
i have the same problem with my legacy 2.2 GX took it to subaru showing error code knock sensor i thought it was due to the fact that only 1 radiator cooling fan was kicking in not both it is in subaru tomorrow for the knock sensor to be replaced lets see what happens. i still think it is due to the cooling fans.
×