CAR OBD CODES
OBD/DTC Search, e.g.P0178
CAR OBD CODES P0178
P0178 OBD Code Definition:
P0178 Fuel Composition Sensor Circuit Low Frequency
P0178 OBD Code Description:
OBD2 Code P0178 Definition:
Fuel Composition Sensors are used to determine the amount of ethanol alcohol in the gasoline. Normally, a gasoline engine should not have more than 10% ethanol alcohol in the fuel for proper operation. Some vehicles have a flexi-fuel system on them that allow them to run on up to 85% ethanol alcohol in the fuel. The fuel composition sensor sends a frequency modulated signal to the engine controller which is proportional to the alcohol content of the fuel. The injector pulse width and the ignition timing are modified for the increased alcohol content. It takes almost twice the amount of alcohol compared to gasoline to produce the same power.
Symptoms
Possible sumptoms of P0178
– Engine Light ON (or Service Engine Soon Warning Light)
Possible Causes
Possible causes of P0178
– Open or short in FF sensor VPWR circuit – Open in battery ground to FF sensor circuit – Open in FF sensor signal circuit – Short to ground in FF sensor signal circuit – Fuel contamination – Short to VPWR in FF sensor batte
Possible Solutions
Note: The information on the P0178 error code is purely informative, if you need more useful information, please consult your technician.
B0050 B2C90 P0B27 B117F B0111 B209F B11BA B1532 B2570 B2633 B142D B2401 B123C B2757 B1384 OBDII Chassis Codes
C1898 C0495 C1950 C1716 C1767 C1313 C003C C1524 C1A58 C0003 C1190 C112E C1733 C0300 C1310 OBDII Network Codes
U0123 U0323 U1238 U047A U2509 U3006 U1135 U0179 U1017 U0316 U0034 U1145 U0598 U0319 U1073 OBDII Powertrain Codes
P010B P1793 P2190 P1709 P2272 P02A5 P0232 P1665 P00BB P1146 P0B9E P018F P3445 P0BC9 P0519