Cel 171 ? (1 Viewer)

[co279]

I Bought A 1997 FZJ80 A Couple Of Month's Ago And I Keep Getting A Cel 171 (fuel System Too Lean Bank #1). The Used Car Dealer Replaced The Air Flow Sensor And The O2 Sensors With Aftermarket O2 Sensors. I Replaced The Coolant Temp Sensor. All Vacum Lines And Breather Hoses Are In Good Shape. Any Ideas? I Am Not Ready To Take It To Toyota Yet.

 

[landtank]

replacing the aftermarket O2 sensors with OEM would be my first step. Also check the air tube that goes from the filter box to the throttle body for cracks as well as the weld at the Y in the front exhaust pipe. That weld usually cracks on the inside next to the motor.

 

[co279]

I just ordered my new o2 sensors from cruiserdan. I could not find any exhaust or intake cracks.