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2001 expedition 5.4 check engine light went on and i scanned it and came up with po 172 and po 175 codes my scanner says bank one rich and bank two rich for both whats the fix thanks?
Wiki User
∙ 16y ago
The way, I took care of this problem on my 98 Ford Expedition XLT. Was I bought 2 big bottles of Fuel Injector Cleaner? I did it for the next two fill up's and what it did was clean all 4 Oxygen sensors. Problems fix the easy and cheapest way too... Oxygen Sensor There are actually (4) O2 sensors on your truck. IF you look inside the wheel wells behind the fender liner, right about where the frame is one O2 sensor, the other is underneath the truck about half way back in relation to the transmission. IF you see where the exhaust joints together, you went about 6" too far.
When you start looking at the O2 sensors, they are normally numbered something like "Bank 1 Sensor 1" Bank 1 is on the passenger side; Bank 2 is on the driver's side. Sensor 1 is the upstream sensor (near the frame, between the block and the cat) and Sensor 2 is near the Y-pipe (downstream of the cat).
Normally it is the upstream sensors (sensor 1) that go first. They see the harshest conditions. *** Auto Zone sales the Oxygen sensors for $50.00 each. ***
Wiki User
∙ 16y ago
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