Cat removal O2 & wideband location?

Reply Subscribe

Thread Tools

Search this Thread

Jan 10, 2013 | 11:32 AM

#11

Ace25

Thread Starter

Joined: Aug 2012

Posts: 122

From: Fargo

With all due respect, I don't think an O2 emulator will work on my 2005.

ZZ has them here, but only list a 2000 - 2003
Easy Performance - O2 Emulator #EP-O2SM-GM01
They also mention this:

Quote:

The second oxygen sensor is located after the catalytic converter and is used only to detect the performance of the converter. The PCM does NOT use any data from the secondary O2 sensor for engine management. The PCM will set an SES (service engine soon) light (for P0140, P0141 and/or P0420) if the catalytic converter is removed, the sensor is removed, or the sensor goes bad.

I have HP tuners, so disabling the codes is a non issue and I tried that. My Long Term Fuel Trims were REALLY high without the rear O2. I think I have to agree with ChibiBlackSheep that there are more parameters being read by that rear O2...