2004 Chevrolet Tahoe 5.3L with engine code P0178

Question

hello,2004 Chevrolet Tahoe 5.3L showing code p0178. Does history show that this indicates the need to replace the flex fuel sensor, or is there something else?

Answer 1

P0178 Fuel composition sensor circuit low input.

If its in history,then its just that, This sensor when it detect high alcohol content it goes circuit low, It can also mean low fuel in the tank, or your fuel tank has water in it. Clear the code for now,because its a history code,

Answer 2

P0178 CHEVROLET - Fuel Composition Sensor Circuit Low Frequency

Read more: https://www.autocodes.com/p0178_chevrolet.html