Diagnostic Trouble Code (Dtc) P0461 Fuel Level Sensor Circuit Range/Performance - Isuzu 1999 RODEO Workshop Manual

6E1–270 RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
DIAGNOSTIC TROUBLE CODE (DTC) P0461 FUEL LEVEL SENSOR CIRCUIT
Circuit Description
The Fuel Level sensor is an important input to the PCM for
the Enhanced Evaporative System Diagnostic. The PCM
needs the fuel level information in order to know the
volume of fuel in the tank. The fuel level affects the rate of
change in air pressure in the EVAP system. Several of the
Enhanced Evaporative System Diagnostic sub–test are
dependent upon correct fuel level information.
diagnostic will not run when the tank is greater than 85%
or less than 15% full. (This sensor signal disables the
misfire when the fuel levels are less than 15%). DTC
P0461 is a type D Code.
Conditions for Setting the DTC
f The Fuel Tank Level Slosh Test is completed.
f The Tank Level Main Test is completed.
f The Fuel Tank Level Data is Valid.
f The Fuel Level signal changes by less than 7 counts
(0.14 volts) over a distance of 240 km (146 miles).
RANGE/PERFORMANCE
Action Taken When the DTC Sets
f The PCM will not turn on the MIL.
Conditions for Clearing the DTC
f The PCM turns the MIL off after 3 consecutive driving
trips withouta fault condition present.
f A history DTC will clear if no fault conditions have been
The
detected for 40 warm–up cycles (coolant temperature
has risen 40°F from the start–up coolant temperature
and the engine coolant temperature exceeds 160°F
during that same ignition cycle) or the Tech 2 clearing
feature has been used.
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Chart:
4. This step determines if the fuel gauge and fuel level
sender module are operating correctly.
D06RX057