20+ P0177 Fuel Composition Sensor Circuit Range/Performance. P0177 fuel composition sensor circuit range/performance. Circuit malfunction p0177—fuel composition sensor circuit range/performance p0178—fuel composition sensor circuit low input p0179—fuel composition sensor circuit high input.
P0177 fuel composition sensor circuit range/performance.
Sensor circuit range/performance p0192 fuel rail pressure sensor circuit low input. The fuel composition sensor is also known as a flex fuel sensor (ffs) and measures the the higher the percentage of methanol, the higher the frequency. P0322 ic module 4x reference ckt no frequency. Normally, a gasoline engine should not have more than 10% ethanol alcohol in the fuel for proper operation.