BMW E46 Fanatics Forum banner

oxygen sensors

  1. CAN EGS and oxygen sensor codes

    General E46 Forum
    Hi. I have a 2004 325xi. The ABS, transmission, Service Engine and a few other lights came on recently. When I read the codes, I got the following: FB: No CAN identification EGS 3E: No message from EGS control unit 3D: Activation, oxygen-sensor heater behind catalytic, bank 2 4F: Activation...
  2. Oxygen sensors - best price?

    Driveline, Engine & DME Tuning
    Driving an 05 330i ZHP and wanting to confirm the correct Oxygen sensors and see where everyone has found them for the best price. Car is at 170,000 miles and figured it was time to preventatively replace them. Downstream Bosch 15680 and 15681 Upstream Bosch 17215 and 17216 (I've heard 17215...
  3. Different Oxygen Sensors

    General E46 Forum
    Hi everyone, I just ran my codes for a second time last night and now have certainty that my oxygen sensors are due for replacement (not exactly suprising at 103k miles). Anyway, I am originally from Germany and when I saw the price tag for a new Bosch sensor in the US :excited: :ben: After...
  4. E4 E3 fuel trim bank 1 and 2

    General E46 Forum
    misfires in cylinders 5,6,and 4. Just had all four O2 sensors replaced with bosch. Ill try a smoke test soon after that I've read that it might be the MAF. Is their anything else I can try or check on my iCarsoft scanner? thanks!
  5. Bypassing post-cat O2 sensors easy? How do they work exactly?

    General E46 Forum
    So, after 331K, the post-cat O2 sensors are finally throwing faults (surprisingly, in unison) in my 325Ci. Firstly, can I safely assume that the post-cat sensors on an E46 have no effect on performance, and are there solely for emission control? If so, assuming the heater circuits are still...
  6. 2002, 330i, 114K miles, oxygen sensors

    General E46 Forum
    I have a 2002, 330i with 114K miles. Am I ready for new oxygen sensors? An engine warning light comes and goes(it started around 100K miles). Performance is still OK. With new O2 sensors, would my MPG improve? Any advice?
Top