E46 02 Sensors

Is that the upstream sensor.

E46 02 sensors.

Followup from the pelican staff. Sangyue 02 o2 oxygen sensors for bmw e46 323i 325ci 325i 325xi 328i 330ci 330xi 330i upstream downstream 4pcs. Nick at pelican parts. Your post cat oxygen sensors are there only to check if your catalytic converters are working correctly.

December 16 2017. How to know if oxygen sensor is bad demonstrated on bmw obd scanner used in the video. The oxygen sensor transmits the data to the vehicle s pcm to maintain the optimal air to fuel ratio for your engine. Only 6 left in stock order soon.

I did a scan on my 2001 bmw e46 and the scan says oxygen sensor bank 1 needs to change. Bank 1 identifies the front bank of engine. An observant driver will take heed of its symptoms and address the issue before the malfunction becomes a full replacement. Only 5 left in stock order soon.

Check engine light comes on. A bad or failing oxygen sensor will have a negative impact on environmental emissions and engine performance so there are a 3 things to watch out for before your oxygen sensor completely fails. A faulty oxygen sensor a relatively small component of the fuel delivery system can have a large impact on fuel economy and engine performance in the bmw. For the bmw 3 e46 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 model year.

Bank 1 vs bank 2. There should be a sensor number to go with it to identify if pre or post cat. Every 20 miles the dme will but the the engine through a test cycle where the afr is altered and the dme will wait for the post cat o2 sensors to pick up the change in o2 concentration.