1998 Ford Expedition know

[quote:c2925220bb="sergio4317"]Electrical problem
1998 Ford Expedition V8 Two Wheel Drive Automatic

i have a problem on p0133 code
but i change a sensor h20s upstream sensor before at cataly .but the problem still there. so do you have any idea on that problem. because the truck when is cold run fine but after 10 or 15 min loose power
or after 35 mph i dont if need to change other sensor[/quote:c2925220bb]

Hello,

Here is the code def...

P0133 Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 1)

Bank 1 is the passenger side

Bank 1 Sensor 1 is the sensor in the exhaust Manifold.

Bank 1 Sensor 2 would be the one you changed.

.