2000 Ford Taurus FFV P1151 Code: Causes, Fixes & Solutions for Pregnant Drivers
I've been experiencing persistent issues with my 2000 Ford Taurus FFV, and recently the vehicle has triggered a P1151 diagnostic code. The list of potential causes is overwhelming, so I'm seeking clarity: can a faulty catalytic converter be responsible for this error? I've already replaced both oxygen sensors, inspected and cleaned the EGR system, replaced all vacuum lines connected to the EGR, cleaned the Mass Air Flow (MAF) sensor, and had a fuel pump installed about a year ago—though I'm uncertain if it was actually replaced or if I was overcharged. I've also thoroughly checked for vacuum leaks (to the best of my non-mechanic knowledge), installed a new fuel filter, and tried several other fixes. As I'm currently 7 months pregnant, I urgently need this vehicle to be safe and reliable before driving my baby around. Any accurate troubleshooting steps or expert advice would be incredibly helpful.
P1151 = HO2S Bank 2 Sensor 1 Insufficient Switching Lean Mean. Did you install aftermarket oxygen sensors? If so, this could be the root cause. Replace the passenger-side upstream O2 sensor with an OEM part from a dealership to ensure proper signal accuracy and resolve the code.