Oxygen Sensor Before Catalytic Converter Bmw

Oxygen sensors are laid out in banks which refer to cylinders and in sensor numbers referring to before or after the catalytic converter. Bank1 or B1 refers to cylinders 1. Shows how to replace the pre-catylitic converter oxygen sensor.

This is an easy install you can do yourself. BMW rates oxygen sensors to 100,000 miles but they often can last a lot longer. « Previous Thread Next Thread pre or post o2 sensor.

I would urge NOT to buy ANYTHING until you have tested the wiring for the HEATER circuit (NOT Sensor signal) for #2 O2 Sensor BEFORE Catalytic Converter. I would ALSO urge that we ALL quit thinking of Fault Codes as indicating WHAT COMPONENT TO REPLACE. DIY guide to replacing oxygen O2 sensors to fix rough idle and limp mode issues in your vehicle.

This part is listed by BMW as BMW part number 11787558073 and is described as Oxygen Sensor - Pre-Cat - Rear Downpipe - E9X 325i 328i 330i E60 525i 528i 530i, E82 128i. For full BMW fitment information or for assistance from one of our BMW experts, we recommend calling us at 877. EB DME: Trimming, oxygen sensor before cat., bank 1 EC DME: Trimming, oxygen sensor before cat., bank 2 Do these mean that both pre cat sensors need to be replaced.

Thanks guys. The BMW P2098 code is a fault code that indicates a problem with the oxygen sensor before the catalytic converter 2 trim control. This code is related to the post-catalytic converter fuel trim system and is triggered when the engine control module (ECM) detects that the fuel trim is outside of the expected range.

Could a faulty catalytic converter cause code P2098 in a BMW? - While a faulty catalytic converter can affect exhaust composition, code P2098 specifically relates to the oxygen sensor and its readings before the catalytic converter. Figure 3 Replacing sensors before catalytic converter: Oxygen sensors are located in the exhaust manifold. Remove the engine covers.

See our tech article on engine covers removing. Locate the oxygen sensor electrical connectors at the right side of the engine above the exhaust manifold. Label or mark the wiring harness to aide during reinstallation.

I suggest replacing one sensor at a time so.