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How many 02 sensors does a 2007 Chevy Express 1500 4.3 have I only found 2 on the cat

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Hello Wilber,

My power distribution schematic shows two 02 sensors.

Under Hood Fuse Block -

02 SNSR A - Fuse 40 15 Amp
02 SNSR B - Fuse 39 15 Amp

There are only two and always located on the exhaust system.

Posted on Apr 18, 2017

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One should be at front catalytic converter and one behind.Which one are you trying to change?

Posted on Apr 19, 2017

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Posted on Jan 02, 2017

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