It is on the black metal coolant lines coming out of your intake that eventually go to your heater core.Have not tried that, where is it located and how do I test it?
Cool, Thanks.No scanner just a 12v test light and a jumper wire/paper clip
DIY KOEO/KOER/Cylinder Balance Self-Test Procedure
It takes a while getting used to the codes. Every time I look away I think it blinks again :lmao