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2. Check for looseness or damage at the fuel fill pipe and the fuel vapor return pipe.
Are the parts OK?
YES : The fuel fill pipe and fuel vapor return pipe are OK. Check the fuel tank unit base gasket and the
fuel tank, then do the repair verification .
NO : Repair or replace the damaged parts, then do the repair verification .
REPAIR VERIFICATION
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1. Turn the ignition switch to LOCK (0).
2. Install the parts in the reverse order of removal.
3. Turn the ignition switch to ON (II).
4. Reset the PCM with the HDS See HOW TO TROUBLESHOOT THE A/T SYSTEM or HOW
TO TROUBLESHOOT THE FUEL AND EMISSIONS SYSTEMS .
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5. DO THE PCM IDLE LEARN PROCEDURE .
6. Do the EVAP FUNCTION TEST with the HDS.
Is the result OK?
YES : Troubleshooting is complete.
NO : Check for poor connections or loose terminals at the FTP sensor, the EVAP canister purge valve, the
EVAP canister vent shut valve, and the PCM, then go to step 1.
DTC P0457: EVAP SYSTEM LEAK DETECTED/FUEL FILL CAP LOOSE OR
MISSING
Fig. 217: DTC Troubleshooting Flow Chart (P0457)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
NOTE:
Before you troubleshoot, record all freeze data and any on-board snapshot, and
review the general troubleshooting information See HOW TO TROUBLESHOOT
THE A/T SYSTEM or HOW TO TROUBLESHOOT THE FUEL AND EMISSIONS
SYSTEMS .
Confirmed
DTC
Pending
DTC
Freeze
Frame
DTC Description
P0457 EVAP SYSTEM LEAK DETECTED/FUEL FILL CAP
LOOSE OR MISSING
1. Fuel fill cap installation check:
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1. Check the fuel fill cap (the cap must say TIGHTEN TO CLICK). It should turn 1/4 turn after it is
tight, then it clicks.
Is the correct fuel fill cap installed and properly tightened?
YES : Go to step 2.
NO : Replace the fuel fill cap or tighten the cap, then do the repair verification .
2. Fuel fill cap seal and fuel fill pipe matching surface visual check:
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1. Check the fuel fill cap seal (A) and the fuel fill pipe matching surface (B). Verify that the fuel fill
cap tether cord (C) is not caught under the cap.
Fig. 218: Identifying Fuel Fill Cap Seal, Cap Tether Cord, Pipe Matching Surface
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is the fuel fill cap seal missing or damaged, is the fuel fill pipe damaged, or is the tether cord caught
under the cap?
YES : Replace the fuel fill cap or the fuel fill pipe, then do the repair verification .
NO : The fuel fill cap and the fuel fill pipe are OK. Go to step 3.
3. Problem verification:
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1. Turn the ignition switch to ON (II).
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2. Clear the DTC with the HDS See HOW TO TROUBLESHOOT THE A/T SYSTEM or
HOW TO TROUBLESHOOT THE FUEL AND EMISSIONS SYSTEMS .
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3. Select the EVAP TEST in the INSPECTION MENU, and do the FUNCTION TEST with the
HDS.
Is the result OK?
YES : Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at
the FTP sensor, the EVAP canister vent shut valve, and the PCM.
NO : The failure is duplicated. Go to step 4.
4. EVAP canister vent shut valve operation check:
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1. Clear the DTC with the HDS See HOW TO TROUBLESHOOT THE A/T SYSTEM or
HOW TO TROUBLESHOOT THE FUEL AND EMISSIONS SYSTEMS .
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2. Turn the ignition switch to LOCK (0).
3. REMOVE THE EVAP CANISTER VENT SHUT VALVE FROM THE EVAP
CANISTER .
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4. Connect the 2P connector to the EVAP canister vent shut valve.
5. Turn the ignition switch to ON (II).
6. Select EVAP TEST in the INSPECTION MENU, and do the EVAP CVS ON in the SINGLE
SOLENOID with the HDS.
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7. Check the EVAP canister vent shut valve (A) operation.
Fig. 219: Identifying EVAP Canister Vent Shut Valve
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Does the valve operate?
YES : The EVAP canister vent shut valve is OK. Go to step 5.
NO : REPLACE THE EVAP CANISTER VENT SHUT VALVE , then do the repair verification .
5. EVAP canister vent line check:
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1. Check the routing of the EVAP canister vent tube.
Is there any damage or blockage?
YES : Remove the blockage and replace the EVAP canister vent tube if needed, then do the repair
verification .
NO : DO THE DTC P0455 TROUBLESHOOTING.
REPAIR VERIFICATION
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ο‘
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1. Turn the ignition switch to LOCK (0).
2. Install the parts in the reverse order of removal.
3. Turn the ignition switch to ON (II).
4. Reset the PCM with the HDS See HOW TO TROUBLESHOOT THE A/T SYSTEM or HOW
TO TROUBLESHOOT THE FUEL AND EMISSIONS SYSTEMS .
ο‘
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5. DO THE PCM IDLE LEARN PROCEDURE .
6. Select the EVAP TEST in the INSPECTION MENU, and do the FUNCTION TEST with the HDS.
Is the result OK?
YES : Troubleshooting is complete.
NO : Check for poor connections or loose terminals at the FTP sensor, the EVAP canister vent shut valve, and
the PCM, then go to step 1.
DTC P0461: FUEL LEVEL SENSOR (FUEL GAUGE SENDING UNIT) CIRCUIT
RANGE/PERFORMANCE PROBLEM
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