i have a 2000 durango with a 4.7l and just recentley the check engine light came on and the code came up 0171 bank 1 too lean . but when i drive it i will get 200 km to a tank of fule and its just blowing out black smoke and smells really bad . Please help me fix it cant afford to drive hear shortly

 

did you try changing the O2 sensor, that would be my first thing to try
the o2 sensor controls the mixture, but this code goes against what your other observations say (unburnt fuel in the exhaust is a RICH condition) which would point me to a faulty o2 sensor

 

Also ck the power steering switch,see if the switch is leaking.If the switch is leaking.Ck the o2 sensor connector for p/s fluid.The fluid will short out the sensors and the pcm.

 

well yea b4 it had two code and one had to do something with the powersteering but i did not notice anything after that with it so i dleated that code and then this one came up

 

If the PS switch is leaking, it will drip teh fluid onto the wire harness of the O2 sensor. That in turn will wick the ps fluid into the wiring and cause a short. bets to check both switch and O2 sensor.

 

ok so were would i be looking to see if it was leaking and to cause that short

 

ok well today was gonna replace the 02 and all i did was unplug it shure it gave me another code up it dont smoke like a diesel no more and im getting 18- 24 mpg again ..

 

now finish replacing the sensor that should solve your problem

 

soo i replaced that o2 sencor and it was fine for about three days and then it stared not working again getting 8 mpg now doing 60mph sooo idono how to fix this now and the ps switch werew might that be located at?

 

It's on the pressure line from the pump. The return is the one with the cooler in place before return to the pump.

Did you reset the PCM found here at the top: https://dodgeforum.com/forum/1st-gen...ine-light.html