Error code read bank 1 and bank 2. Changed the sensors light went off but then came back on.
I don't know if you have reset the computer but if not take one battery terminal off for about 5 minutes and that will reset your computer. If you don't have anymore problems it should not come back on.
SOURCE: I get a DTC P0133 code on my 1998 Ford Explorer V8
it may be a defective O2 sensor here is th difinition:
P0133 - Heated Oxygen Sensor (HO2S) Slow Response Bank 1 Sensor 1 , this is the sensor on the side of the engine that #1 cylinder is on, it is the sensor before the cat.
SOURCE: O2 sensor code, possible vacuum leak
bank 1 is the drivers side and sensor 2 is after the cat.
SOURCE: Repalced O2 sensors, mass air flow sensor, and plugs error messag
dpfe velve
small emissions valve with one electrical connnector and three to four vacume lines located near your egr valve. this is a comon fault on fords emmissions system.
SOURCE: o2 sensor reads bad
Get a code scanner and find out which bank has the bad sensor. Replace the O2 sensor and you should be good
SOURCE: 2005 expedition 5.4 bank 1
un plug the fuel injector and see if the raw fuel smell, goes way, if it does the injector could be stuck open. if this is the case the more you run it the more fuel is getting into the crank case, this can wash the bearings and ruin the engine, check the oil see if you smell fuel if you do, you will have to pull up the injector rail with all the injectors and cycle the key one time, watch that injector to see if it drips fuel after the rest have stopped . if it leaks replace the injector all the injector o rings and change the oil.
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I change the one on the manifold to a upstream o2 sensor and the light hasn't came back on .
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