Fuel System - MIL ON/DTC's P0441/P0455/P0456

L-SB-0168-09

November 18, 2009

MIL "ON" DTC P0455 & P0441 or P0456

Service Category
Engine/Hybrid System

Section
Engine Control

Market
USA





Applicability

Introduction

Some 2006 model year GS 300 and GS 430 vehicles may exhibit a MIL "ON" condition with one or more of the following DTCs: P0455 & P0441 or P0456. Use the repair procedure below to address this condition.





Parts Information





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 occurrence of the specified condition described in this bulletin.





Required Tools & Equipment

Repair Procedure

1. Using TIS Techstream clear the stored DTCs.

2. Using TIS Techstream perform the Automatic EVAP System Check. System Select > Engine and ECT > Utility > EVAP System

If P0455 and P0441 or P0456 set go to step 3.

HINT

If DTC P0441 sets ALONE, this TSIB does NOT apply - Refer to the Repair Manual for further diagnosis.

NOTE

If the Automatic EVAP System Check fails to run, perform the following:

^ Turn the ignition key OFF.

^ Turn TIS Techstream OFF.

^ Turn the ignition key ON and TIS Techstream ON and restart the Automatic EVAP System Check.

3. Inspect the fuel cap.

Does it tighten properly?

^ YES - Proceed to step 4.

^ NO - Replace the fuel cap then proceed to step 5.

4. Inspect the EVAP system for the leak source.

Refer to the Technical Information System (TIS) applicable model and model year Repair Manual:

^ 2006
Engine/Hybrid System - Engine Control - "3GR-FSE Engine Control System: SFI System: EVAP System"

^ 2006

Engine/Hybrid System - Engine Control - "3UZ-FE Engine Control System: SF1 System: EVAP System"

Was the leak source isolated at the fuel cap to filler pipe sealing area?

^ YES - Replace the fuel cap then proceed to step 5.

^ NO - This TSIB does NOT apply - Refer to the Repair Manual for further diagnosis.

5. Clear DTCs.

6. Perform the Automatic EVAP System Check and verify NO pending DTCs set.

System Select > Engine and ECT > Utility > EVAP System