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    P0401 & P0133 Codes

    if you can get underneath the truck, look where the cats are. there is one before and one after each cat. they are very easy to get to. bank 1 should be the passenger side. i'm not sure if the o2 sensor could be related to the 0401 code. only thing you can do is drive for a little and see if...
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    P0401 & P0133 Codes

    p0133 O2 Sensor Circuit Slow Response Bank 1 Sensor 1 Possible causes could be a faulty upstream oxygen sensor, faulty fuel injectors, or there could be a air or exhaust leak somewhere. Look at Replacing the Front Heated Oxygen Sensor Bank 1 usually takes care of the problem Read more...
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    How to Check Fuel Pressure 2005 Explorer

    P0172 P0174 P0175 P2196 P2197 P2198 are codes that deal with your oxygen sensors usually. When the signal is biased, it typically means that there is a malfunction with the sensor and it has to be replaced. Bank 1 sensor 1 and bank 2 sensor 1 are both upstream oxygen sensors. The location of...
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