P0461
DTC P0461 FUEL LEVEL SENSOR "A" CIRCUIT RANGE/PERFORMANCEComponent Location:
GENERAL DESCRIPTION
The fuel level sensor measures the fuel level in fuel tank and its signal is used to determine if the fuel level is too high or too low to be able to accurately detect EVAP system failures.
DTC DESCRIPTION
The ECM sets DTC P0461 if ECM detects that fuel level change from maximum to minimum is less than the threshold value.
DTC Detecting Condition:
Specification:
Schematic Diagram:
MONITOR DTC STATUS
NOTE: If any codes relating to Fuel tank pressure sensor, Canister closing valve or PCSV circuits are present, do ALL REPAIRS associated with those codes before proceeding with this troubleshooting tree.
1. Start engine to normal operating temperature.
NOTE: Evaporative Emissions Systems (EVAP) Leak Tests can be run by the Scan Tool The tests are automated and provide either a pass4afl result or directions to check for DTCs.
2. Install scan tool and clear DTC.
3. Perform "EVAP. LEAKAGE TEST" mode referring to enable conditions as below.
NOTE: EVAP Leakage Test enable conditions.
- Following conditions must be fulfilled to start the test.
1. Engine warm up at Idle Status.
2. No relevant DTC.
3. Fuel level is below 80%.
4. Is DTC P0461 set again?
YES: Go to next step as below.
NO: Fault is intermittent caused by poor contact in the sensor's and/or ECM's connector or was repaired and ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.
TERMINAL AND CONNECTOR INSPECTION
1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage
3. Has a problem been found?
YES: Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO: Go to next step as below
COMPONENT INSPECTION
1. Ignition "OFF".
2. Disconnect FLY harness connector.
3. Measure resistance between terminals 1 and 3 of the FLY connector(Component side). Specification
4. Is resistance within specification?
YES: Check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
NO: Check FLY for contamination, deterioration, or damage. Substitute with a known-good FLY and check for proper operation. If the problem is corrected, replace FLY and then go to "Verification of Vehicle Repair" procedure.
VERIFICATION OF VEHICLE REPAIR
1. Return vehicle to original condition.
2. Start engine to normal operating temperature.
NOTE: Evaporative Emissions Systems (EVAP) Leak Tests can be run by the Scan Tool. The tests are automated and provide either a pass4ail result or directions to check for DTCs.
3. Install scan tool and clear DTC.
4. Perform "EVAP. LEAKAGE TEST" mode referring to enable conditions as below.
NOTE: EVAP Leakage Test enable conditions.
- Following conditions must be fulfilled to start the test.
1. Engine warm up at Idle Status.
2. No relevant DTC.
3. Fuel level is below 80%.
5. Monitoring for (pending) DTC.is the same DTC set?
YES: Go to the applicable troubleshooting procedure.
NO: System performing to specification at this time.