They are mounted on the exhaust system, either in the manifold or the pipes....you just have to look for them if not sure.
I have a 2001 tracker with a 2.0 & my dipstick is located on the right hand side of the valve cover about 1/2 way back. the handle sticks up.
at the rear of the engine on 2001 2.L also
don't fix it just go 2 the junkyard get a used one
behind the valve pan cover,
There are 2 sensors. One in front of the catalytic converter and one behind it.
on my 2004 tracker this was caused by a bad relay on the right side inner fender under the hood
there are 2 knock sensors, they are located underneath the intake manifold
I've got a better question, why is this question in the Chevy venture forum ?
where
The 2001 Acura CL OBD 2 port is behind ashtray
back 2
0.028 geo tracker 1990, 8 valves 2 doors