2004 Ford Taurus

BLUEKATZ

MEMBER
2004 FORD TAURUS
6 CYL
FWD
AUTOMATIC
60,150 MILES

I have a 2004 Ford Taurus with just over 60K for mileage and it has suddenly went from about 29 MPG to about 20 MPG. It's using aprox. 75% more fuel than before. No codes and no performance issues other than rich exhaust smell. It has a new IC module. I wonder if I need to replace both O2 sensors? The FI systme has been cleaned and serviced a couple times already in the last 4 years. By choice. This is the 24 valve DOHC engine. If I need to replace the sensors, where could they be found on the engine? Thanks!

1 Reply

KHLOW2008

MECHANIC
41,814 POSTS

Hi bluekatz,

Thanks for the donation.

Rich exhaust smell might be due to a failing catalytic converter or the O2 sensors.

If scanning does not show any code, I would suggest getting it on a diagnostic check. You can check all the components and compare the data to see which is not functioning acording to specifications.

Since you have cleaned the FI system, some thing might have gone out of adjustment and some twinkling is needed to set them right.

Guess work usually leads to a lot of unnecessary replacment and repairs.

The O2 sensors are plugged into the exhaust before and after the catalytic converter.