2 Oxygen Sensors: Bank 1 Sensor 1, Bank 2 Sensor 1 ==> downstream or upstream??

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I am buying the Oxygen sensors for Bank 1 Sensor 1 Bank 2 Sensor 1 Question: Are they "upstream or downstream"???? I have found them for a great price, but the place is asking me are they upstream or downstream? 2005 Suzuki Verona EX

Kartek3 in Portland OR

May 17, 2017

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What is your question?

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2 Oxygen Sensors: Bank 1 Sensor 1, Bank 2 Sensor 1 ==> downstream or upstream??

What is your question?

Kartek3 in Portland OR

May 17, 2017

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DaveJMon May 17, 2017

"Upstream" refers to an oxygen sensor between the engine and the catalytic converter. "Downstream" refers to a sensor after the converter, also known sometimes as a "catalyst monitor sensor". Bank 1 sensor 1 would be the upstream, bank 1 sensor 2 would be the downstream.

Kartek3on May 21, 2017

THANK YOU!!!! I am a computer repair person, but I love doing my own work on my car!! I get the parts and install them. This car is worth keeping, the [Engine Light] is the last petty steps!!

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Popular Answer

What are the best Suzuki repair shops?

RepairPal Certified shops can diagnose and repair your 2005 Suzuki Verona. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

2005 Suzuki Verona auto repair 2005 Suzuki Verona estimates 2005 Suzuki Verona questions 2005 Suzuki Verona problems 2005 Suzuki Verona recalls

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DaveJMon May 17, 2017

Kartek3on May 21, 2017

THANK YOU!!!! I am a computer repair person, but I love doing my own work on my car!! I get the parts and install them. This car is worth keeping, the [Engine Light] is the last petty steps!!