Anonymous asked in Cars & TransportationMaintenance & Repairs · 1 month ago

P0191 & P0401?

Today one my friends bought a OBDII scanner that connects with bluetooth on mobile. He hooked that on my crown vic 2003 and codes stored were P0191 & P0401. I searched on internet and found that one is for EGR valve and one for Fuel Rail Sensor but fortunately my car is running absolutely fine. Do I still have to replace those sensors even though my car is running excellently smooth?

5 Answers

  • 1 month ago

    Might as well fix it now before you need license plate renewal!

  • Anonymous
    1 month ago

    Is the Check Engine Light On in your car?  Yes, you see a mechanic.  No, you leave your car alone.

  • Anonymous
    1 month ago

    Not sure what's causing the p0191 but the p0401 means the sensor is working just fine and the EGR tube is plugged.

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  • Bill
    Lv 6
    1 month ago

    If the check engine light isn’t on, drive on. Use the scanner to erase the stored codes and see if they come back. 

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