Fuel System - MIL ON/DTC P1423 Stored In Memory

L-SB-0116-09

Rev1

September 9, 2009

MIL "ON" DTC P1423 - Fuel Tank Gross Leak

Service Category
Vehicle Interior

Section
Meter/Gauge/Display

Market
USA





Applicability

TSIB REVISION NOTICE

May 13, 2010 Rev1:

^ Applicability has been updated to include 2010 model year LS 600hL vehicles.

^ Parts Information, Warranty Information, and Repair Procedure sections have been updated:
Replacement of fuel tank filler pipe assembly no longer required for repair.

Any previous printed versions of this service bulletin should be discarded.

Introduction

Some 2008 - 2010 model year LS 600hL vehicles may exhibit a MIL "ON" condition with Diagnostic Trouble Code (DTC) P1423 - Fuel Tank Gross Leak, or a fuel cap binding upon installation or removal. Use the following repair procedure to diagnose and repair 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 check for stored DTCs.

2. Verify DTC P1423 is present.

NOTE

If there are any codes present other than P1423, this TSIB does NOT apply. Refer to the appropriate Repair Manual for diagnosis.

3. Check the fuel cap condition.

Does the fuel cap bind while installing or removing?

^ YES - Continue to step 4.

^ NO - Refer to the Technical Information System (TIS) applicable model year LS 600h Repair Manual:

2008 / 2009 / 2010 LS 600h:
Engine/Hybrid System - Engine Control - "2UR-FSE Engine Control System:
SF1 System: P1422, P1423: Fuel Tank Small Leak"

NOTE

While installing the cap use light pressure and only turn until the fuel cap clicks one time.

4. Replace the fuel cap assembly.

5. After the repair is complete perform the Automatic EVAP System Check again to confirm there are NO pending DTC(s) and the system is normal.