2002 Lexus ES300 Q&A

2002 Lexus ES300 Question: Check engine light stays on

No problems since I bought new - now check engine light stays on. Maintained basics, i.e., changed oil,etc. Independent auto shop used diagnostic analysis. Results: Intake Valve Timing P1135 CKT Bank 2. What is this and do I need to take to dealership? -
Answer 1
This description a bit confusing. The P1135 is not a VVT code, looks like it's wrongly interpreted. What kind of diagnostic tool did they use? The P1135 is the O2 sensor code. P1135 (Air Fuel Ratio Sensor Heater Circuit Malfunction, Bank 1, Sensor 1 and not a VVT code. I'd gat an other diagnostic from an other shop to be sure about the problem. There is a huge difference between a few hundred dollar scanner and a $ 10,000+ diagnostic computer. Anyway, there is a TSB out form Lexus to address the P1135 DTC. Looks like you need to replace the Air-Fuel Ratio Sensor at Bank 1-Sensor 1. Here is the TSB: Engine Controls - MIL ON/Multiple DTC's Set ENGINE EG001-02 REVISED Title: M.I.L. "ON" DTC P1130, P1135, P1150 OR P1155 Models '02 ES 300 April 23, 2002 TSIB REVISION NOTICE :June 25, 2003: TSIB applies to all 2002 ES 300 vehicles. The previous TSIB should be discarded. Introduction Under certain driving conditions, some 2002 model year ES 300 vehicles may exhibit a M.I.L. "ON" with one of the following DTCs as a result of an Air Fuel (A/F) Sensor manufacturing and installation issue. ^ P1130 (Air Fuel Ratio Sensor Circuit Range/Performance Malfunction [Bank 1, Sensor 1]) ^ P1135 (Air Fuel Ratio Sensor Heater Circuit Malfunction [Bank 1, Sensor 1]) ^ P1150 (Air Fuel Ratio Sensor Circuit Range/Performance Malfunction [Bank 2, Sensor 1]) ^ P1155 (Air Fuel Ratio Sensor Heater Circuit Malfunction [Bank 2, Sensor 1]) With DTC P1130, additional DTCs may be recorded including P0171, P0300, P0301, P0303 or P0305. With DTC P1150, additional DTCs may be recorded including P0174, P0300, P0302, P0304, P0306. Replacement of the affected Air Fuel Sensor will correct this condition. Applicable Vehicles 2002 model year ES 300 vehicles. Parts Information Warranty Information Applicable Warranty *: This repair is covered under the Lexus Comprehensive 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. Repair Procedure P1130 or P1135 1. Refer to 2002 ES 300 Repair Manual Volume 1, pages 05-141 to 05-142 for diagnosis of P1135 2. Confirm open circuit in A/F Sensor heater if P1135 is stored. 3. Refer to the 2002 ES 300 Repair Manual, Volume 2, page 12-10, for details in replacing Bank 1 Sensor 1 A/F Sensor. 4. Only replace the A/F Sensor indicated by the M.I.L. "ON" DTC(s) P1150 or P1155 1. Refer to 2002 ES 300 Repair Manual Volume 1, pages 05-141 to 05-142 for diagnosis of P1155 2. Confirm open circuit in A/F Sensor heater if P1155 is stored. 3. Refer to the 2002 ES 300 Repair Manual, Volume 2, page 12-10, for details in replacing Bank 2 Sensor 1 A/F Sensor. 4. Only replace the A/F Sensor indicated by the M.I.L. "ON" DTC(s) Zee -
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