2003 Toyota RAV4: Engine Codes P0141 & P1155?

Both this error codes are related to Heater Element.

Proper inspection is required.

The P0141 code means that the heater element in the oxygen sensor bank one sensor two or B1 S2 has failed. This in itself will not cause an igniter problem Or a performance problem. Code P1155 means that the heater element in the AFR sensor or air fuel ratio sensor for bank two sensor one has failed. This is identified as B2 S1. This also will not cause an issue with performance or the igniter problem. In most of cases it ends up just being a bad sensor. Make sure that you replaced the correct sensors.

This details will help.
Thanks.

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Part detail for Lexus Es300 AFR sensor bank 1 sensor 1?

The Lexus California AFR sensor part number details.

Buy the Original Lexus Parts or use only a denso sensor and most aftermarket parts stores sell them.

The Lexus part number is: 89467-41020 this should cross over to the 234 – 9007 DENSO number. If you check with your local parts store they should be able to verify this and save you some money. If you do a Google search there are tons of places online that sell DENSO AFR sensors reasonably inexpensive compared to the dealer.

This details will help you to get Right AFR sensor for your Lexus car model.

Thanks.

For All types of Car models and brands help 
Go to Newly Launched

FREE Car repair guide? 
http://technoanswers.blogspot.in/2012/03/car-repair-guide.html 

& 
Complete Car repair Help FREE? 

http://repairhelpcenter.blogspot.in/2012/03/complete-car-repair-help.html