Help, code P1072 Too Rich - Page 2

Aug 10, 2015 | 01:14 PM

#26

9krpmrx8

SARX Legend

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From: San Antonio, Texas

Quote:

Originally Posted by chunbelievable

Thanks for the heads up on the discount. Sorry to be a pain in the *** but I am still confused on the difference between the AFR (front) sensor and the UPSTREAM sensor. Which is it that I need to replace? Advanced lists both AFR and UPSTREAM separately and at different prices as well.

There are two sensors in the exhaust stream, the first one on the exhaust manifold is the upstream sensor and it is a wideband O2 sensor. The second O2 sensor in the exhaust stream is the downstream O2 sensor and it is located in the cat pipe (midpipe) and it is not a wideband sensor so it is cheaper. The downstream sensor is also less important and generally when it is failing, it will not cause issues with the way the car actually performs.

Aug 10, 2015 | 04:13 PM

#27

chunbelievable

Thread Starter

Tetsumakysenpukyaku

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Joined: Jan 2008

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From: Throwing Sonic Booms

I get the difference between the front and rear... There's just a manufacturer that lists a front, upstream and rear sensor. So it confused the hell out of me. I'm good now.