Testing oxygen sensor in 1991 BMW 318

JackNoble
Mon, 02 Jul 2018 23:13:42 +0000
Maintenance/Repairs

Recently I noticed that my gas mileage has fallen off a bit; maybe as much as 10%. I suspect that after 235,000 miles that my oxygen sensor may have become contaminated. Is there a simple way to test it?

2 posts - 2 participants