blackouthx

okay so my problem with my car is:

1) check engine light on for secondary O2 sensor

2) wouldnt let me rev past 4K RPM's for a couple days , now I can for some reason

3) when I am driving and hold it steady at a particualar RPM (usually between 2K- 4K) it feels like I am pushing down on the gas and letting off repeatedly . kind of like in a rocking motion, the rpm's dont fluctuate just the rocking motion.

I know the secondary oxygen sensor being bad will not cause this so what could?

its a 2000 civic hx.
Mods: SRI, DC headers, full cat back

1ludeEK

cat. 9 times out of 10 the secondary o2 is there to tell you if your cat is in workin condition. by what you are saying it should be the cat.

blackouthx

yeah I understand that the secondary O2 sensor is to tell you if you cat is efficiently working or not but since my cat is only about 4 months old and the code is for low voltage leads me to believe it is a faulty sensor, even if it was a bad cat or wire this still would not cause my problems I have been having.

thx