Diagnostic Trouble Code (Dtc) P0462 Fuel Level Sensor Circuit Low Input - Isuzu 1999 RODEO Workshop Manual

6E1–272 RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
DIAGNOSTIC TROUBLE CODE (DTC) P0462 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. The
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%). If the
PCM detects a continuous short to ground in the Fuel
Level sensor or circuit, then a code P0462 will set. DTC
P0462 is a type D code.
Conditions for Setting the DTC
f The Fuel Tank Slosh Test is completed.
f The Fuel Tank Main Level Test is completed.
f The Fuel Tank Level Data is valid.
f The Fuel Level signal voltage is less than 0.06 volts for
a period greater than 20 seconds.
LOW INPUT
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 without a fault condition present.
f A history Diagnostic Trouble Code will clear if no fault
conditions have been detected for 40 warm–up cycles
(coolant temperature has risen 40°F from the start–up
coolant temperature
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 checks the wiring, connections, and the
PCM.
6. This step checks the wiring, connections, and the
PCM.
D06RX057
and the engine coolant