Fuel System - MIL ON/DTC P0441/P0455/P0456 Set
L-SB-0030-08Rev1
May 27, 2008
M.I.L. "ON" DTC P0441, P0455, or P0456
Service Category
Engine/Hybrid System
Section
Engine Control
Market
USA
Applicability
TSIB REVISION NOTICE
^ September 30, 2008 Rev1:
^ The Introduction has been updated to clarify applicability to NAP vehicles.
^ VINs have been updated in the Production Change Information table.
^ The part number for the Fuel Tank Pipe Sub-assembly has been updated.
Any previous printed versions of this service bulletin should be discarded.
Introduction
Some 2007 2008 model year North American produced (NAP) RX 350 vehicles may exhibit a M.I.L. "ON" condition with one or more of the following Diagnostic Trouble Codes (DTCs):
^ P0441 Evaporative Emission Control System Incorrect Purge Flow
^ P0455 Evaporative Emission Control System Leak Detected (Gross Leak)
^ P0456 Evaporative Emission Control System Leak Detected (Very Small Leak)
An improved fuel filler pipe has been developed to address this condition. Use the following repair procedure to diagnose and repair customer complaint vehicles.
Production Change Information
This TSIB applies to vehicles produced BEFORE the Production Change Effective VINs shown.
Warranty Information
APPLICABLE WARRANTY
^ This repair is covered under the Lexus Federal Emission Warranty. This warranty is in effect for 48 months or 50,000 miles, whichever occurs first, from the vehicle's in-service date.
^ Warranty application is limited to correction of a problem based upon a customer's specific complaint.
Parts Information
Required Tools & Equipment
NOTE
Additional TIS Techstream units may be ordered by calling Approved Dealer Equipment (ADE).
Repair Procedure
1. Using TIS Techstream, clear the stored DTCs.
2. Using TIS Techstream, perform the EVAP System Check to confirm that P0441, P0455, or P0456 are pending and a leak is present.
Refer to the Technical Information System (TIS):
^ 2007 / 2008 model year RX 350 Repair Manual, Engine/Hybrid System Engine Control "2GR-FE Engine Control System: SFI System: Data List / Active Test"
3. If P0441, P0455, or P0456 are present, disconnect the fuel tank vent hose (between the fuel tank and canister) from the charcoal canister.
Refer to TIS:
^ 2007 / 2008 model year RX 350 Repair Manual, Engine/Hybrid System Emission Control "2GR-FE Emission Control: Canister: Removal"
4. Using TIS Techstream, clear the stored DTCs.
5. Seal off the fuel tank vent hose and purge VSV connections at the canister to isolate the canister side of the system and rerun the Automatic EVAP System Check.
NOTE
If DTCs P0441, P0455, or P0456 are present, the leak is located on the canister side of the system and this TSIB does NOT apply. Refer to the Repair Manual for more diagnostic information.
6. If DTCs P0441, P0455, or P0456 do NOT return, the leak is on the fuel tank side of the system. Inspect the fuel filler neck and fuel cap threads. If any irregularities are noted, replace the fuel filler pipe and fuel cap.
7. After the repair is complete, perform the Automatic EVAP System Check again to confirm that there are NO pending DTCs and that the system is normal.