codes
my truck has 5 error codes P0122 throttle position sensor low input the book says should be @ 5volts but i checked it and its @4.9 is that still too low? P0420,P0430 catalyst system efficiency below threshold left & right bank what dose that mean ? P1122 throttle position circuit intermittent low voltage . what does that mean ? checked TPS operation like the manual says 0.6@ closed position to 4.5 @full open position i got 0.6 to 4.4 does the .1 volt make a differance ? last one B0090 my book does not have this code .whats this code for . thanks for all your help.