1999 Ford F-250 Super Duty Q&A
1999 Ford F-250 Super Duty Question: o2 sensor
The heated oxygen sensors are located after the exhaust manifolds and before the catalytic converters. The catalyst monitor sensors (also often referred to as "oxygen sensors") are located directly after the catalytic converters. Why are you seeking to replace them? Share your diagnosis or reasoning, as many times oxygen sensors are needlessly recommended and fix nothing for you. - DaveJHM
why dont you include the price of oxygen/air fuel sensors
truck get less fuel mileage then my 99 gmc with 5.3l towing my 27' travel trailer.
After fixing leak at the pipe and manifold (left bank) and replacing ALL O2 sensors that cat code came up. Any fixes other than replacing Cat?
Replaced intake gaskets, no change. switched COP's and no change.