2000 f-250 V10 computer sent code that oxygen sensor was bad so i replaced both of them still did not fix the prob but i erased the code and it has not come back it is kinda like a miss fire but there is no code for miss fire

This diagnostic trouble code (DTC) is a generic powertrain code.... Basically this means that an oxygen sensor in bank 1 has detected a lean condition (too much oxygen in the exhaust).On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1

if the fault code is back the fault is not fixed , Check other reasons left bank is running lean. also check oxygen censer is not faulty.

system to lean--bank 2--, this means that an oxygen sensor in bank 2 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 2 is generally the side of the engine that doesn't have cylinder #1.in the vast majority of cases, simply cleaning the maf sensor will do the trick. (MAS S AIR FLOW SENSOR) you can go to any auto parts store and buy a can of sensor cleaner, just follow instructions on can. but be very careful with the sensor it is very delicate. be sure it is dry before replacing it.check all vacuum lines and be sure fuel filter is not clogging up. good-day!

p0171 is system to lean ( bank 1 ). did you turn off check engine light with a scanner! if not go to auto-zone and they will erase it for free, then you can see if light stays off. There could be a vacuum leak downstream of the MAF sensor.

Inspect all vacuum and PCV hoses, replace if necessary

Check for a dirty fuel filter and proper fuel pressure. Basically this means that an oxygen sensor in bank 1 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1. good-day!!

P300 is random multiple misfire,301 is cylinder 1 misfire. 302 is cylinder 2 misfire & 306 is cylinder 6 misfire. P161 is a bad heater circuit in oxygen sensor bank 2 sensor 2. It is behind catalytic convertor. I would replace downstream oxygen sensor & clear codes. Run vehicle it may be all that is wrong.

Harness or connectors (The sensor circuit is open or shorted)
- Front Heated oxygen sensor (Bank 1) may be faulty Possible Solution Replacing the O2 Sensor 1 usually takes care of the problem P0135 Description The front heated oxygen sensor (or sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the ECM. The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V. When is the code detected? - Current amperage in the front heated oxygen sensor heater circuit is out of the normal range. (An improper voltage drop signal is sent to ECM through the front heated oxygen sensor heat a four thumbs up would be helpful if this fixed your problem thanks have a nice day

It takes THOUSANDS of misfires to make the obd code stick in you computer. An intermittent miss could go on for a long long time before it shows on the computer.

The Ford computer readers get more specific info from the ECU.

You may simply need plugs wires and rotor/cap. The truck is 10 years old after all. A few doses of injector cleaner may help as well if you have deposits causing poor misting on a cylinder or two. I would also suggest having your fuel pump pressure tested since poor pressure is one of the things that can cause drivability issues and not show up on a code scan. I hope OBD 3 has a code for this someday!

Good luck and be careful.

Basically this means that an oxygen sensor in bank 2 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 2 is generally the side of the engine that doesn't have cylinder #1.

A code P0174 may mean that one or more of the following has happened:

•The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters can cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
•There could be a vacuum leak downstream of the MAF sensor.

Possible solutions include:

•In the vast majority of cases, simply cleaning the MAF sensor does the trick. Consult your service manual for its location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
•Inspect all vacuum and PCV hoses, replace if necessary
•Check for a dirty fuel filter and proper fuel pressure

p0172 is--system to rich ( bank 1). an oxygen sensor on bank 1, detected a rich condition ( to little oxygen in exhaust ) v6-v8 - v10 engines, bank 1 is the side of the engine that has # 1 cylinder. causes could be a vacuum leak in a hose, a dirty or bad maf sensor, or fuel pressure or delivery problems.

oxygen sensors are only indicatores of oxygen in the exhaust, You could have an exhaust leak and the oxygen in the exhaust is reading to lean, that will give you an O2 code. Did you have the codes erased also. sounds like you have a too lean or to rich situation or maybe an egr valve malfunction. I hope this helps you