Does secondary O2 sensor hurt fuel economy? Civic 2005 engine D17A. I'm facing poor fuel average In my civic and only installed a primary o2 sensor. Getting 10kmpl in city ATM
there's no reason o2 sensor causes bad mileage until its bad.
10kmpl with that civic is not poor. it gives 11 max
11 kmpl? One of my friend swapped it in a khyber and gains 14kmpl with aftermarket header, exhaust, downpipe etc. If its light weight and is reason for good mileage, then my 95 civic is lighter for a 1700 CC too
Yours is a 2005 civic not 95. I had a 2005 vti it hardly gave me 8kmpl with stock engine. Since you have a d17 , 10 is really nice
that mileage is normal.
