Hello my car is a 2008 chevrolet impala 3.5 flex fuel and every so often it will say reduced engine power and throw a code p0641 and I though it was the throttle body and I cleaned it out and reduced engine power never came back on however everytime the reduced engine power came up it will also throw a code po452 fuel pressure sensor low input I have been told the fuel pressure sensor is in the gas tank but I'm not sure why could this be happening
My car has 170000 miles.
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The P0452 is for the fuel tank pressure sensor and not for the fuel pressure sensor for the engine. The fuel tank pressure sensor can be on if you had a loose gas cap or a evaporative emission system leak that could have caused the code. The code P0641 is a serious code concerning the throttle position sensor shorted to reference voltage. Your best bet would be to have a qualified technician, such as one from YourMechanic, inspect the Check Engine Light in person to determine exactly what repairs are needed.
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