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Randy, Certified Technician
Category: Toyota
Satisfied Customers: 9798
Experience:  I have over 25 years expierence.
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2006 Toyota Sienna: p0430..has two sensors on bank 2, one

Customer Question

P0430 does it signify which sensor on bank 2 is the issue? Have 2006 Toyota Sienna, has two sensors on bank 2, one before the CAT and one after.
Submitted: 5 years ago.
Category: Toyota
Expert:  Randy replied 5 years ago.
Hello! I will assist you with your question and get your problem resolved.

• Bank 1 refers to the bank that includes cylinder No. 1
• Bank 2 refers to the bank that does not include cylinder No. 1
• Sensor 1 refers to the sensor closest to the engine assembly.
• Sensor 2 refers to the sensor farthest away from the engine assembly.
Customer: replied 5 years ago.
all they gave me is the fault code, how do i know if it's sensor 1 or 2 on bank 2?
Expert:  Randy replied 5 years ago.
I can give you all the diagnostic info related to the code, it requires testing to determine exact cause and sensor.
Customer: replied 5 years ago.
The autoparts store used their diagnostic tool to show the P0430, then proceeded to sell me an 02 sensor for bank 2, except when i crawl under the car, the sensor they sold me seems to be the one on the front side of the CAT, the one after the cat has a different connect and the harness goes through the floorboard and the connector is under the carpet. How would the parts guy know what sensor he was supposed to sell me?
Expert:  Randy replied 5 years ago.
He probably sold you the most common one to go bad.
Customer: replied 5 years ago.
is there some other test i can do with a multimeter to determine which sensor is really at fault then?
Expert:  Randy replied 5 years ago.
No. All testing requires scan tool and complicated procedures.
The Toyota dealer charges around $500.00 to correct this.
Customer: replied 5 years ago.
you mean there is no resistance test i can do to determine a gross failure?
Expert:  Randy replied 5 years ago.
I am sorry for this, in your position, if you install the sensor, and it does not correct it is non returnable and then you will be stuck with replacing the other sensor and the only accurate test are listed in the diagrams.