Alero L4-144 2.4L DOHC VIN T SFI (2000)
Fuel Gauge Sender: All Technical Service Bulletins
Fuel Level Sensor - DTC P0461/Revised Diagnostics
File In Section: 06 - Engine/Propulsion System
Bulletin No.: 01-06-04-026
Date: April, 2001
SERVICE MANUAL UPDATE
Subject:
Revised DTC P0461 Fuel Level Sensor Performance Diagnostic Procedure
Models:
2000 Oldsmobile Alero
2000 Pontiac Grand Am With 2.4L Engine
This bulletin is being issued to revise the DTC P0461 Fuel Level Sensor Performance diagnostic procedure in the Engine Controls - 2.4L sub-section of
the Service Manual. Please replace the current information in the Service Manual with the following information.
The following information has been updated within SI2000. If you are using a paper version of this Service Manual, please make a reference to this
bulletin on the affected page.
Conditions for Running the DTC
^
The ignition is ON.
^
The system voltage is between 11 and 16 volts.
Circuit Description
The Powertrain Control Module (PCM) uses the fuel level input in order to calculate the expected vapor pressures within the fuel system. These vapor
pressures vary as the fuel level changes. The vapor pressure is critical in determining if the evaporative emissions (VAP) system is operating properly.
The PCM also uses the fuel level in order to determine if the fuel level is too high or too low to be able to accurately detect EVAP system malfunction.
Conditions for Setting the DTC
Fuel level has not changed more than 1.6 percent in 193km (120 miles).
Action Taken When the DTC Sets
^
The PCM will record the operating conditions during the time which the diagnostic fails. This information will store in the Failure Records
buffer.
^
A history DTC stores.
^
The fuel level will default to 40 percent.
Conditions for Clearing the DTC
