Bmw e90 knock sensor replacement e91, e92, e93 pelican parts diy maintenance article electricity and magnetism purcell

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Comments: 2010 535I. HAS A CODE P135B, I BELIEVE IS A KNOCK SENSOR CODE. CAR IS IN REDUCED POWER MODE. CLEAR CODES AND COMES RIGHT BACK, CAR STILL RUNS FINE JUST DISPLAYS REDUCED POWER. I SAW A TSB SOMEWHERE ABOUT IT. WHATS MY NEXT STEP TO GET IT FIXED.

Comments: Would a primary knock sensor code …that caused my 335xi to go in limp mode… also cause a secondary "turbo deactivation" code? Im replacing the knock sensor tomorrow. And it was the first code thrown. When I limp mode engin half power I would imagine my turbo boosts would be deactivated partially or fully. Is that secondary code related or something else to worry about? Thank you in advance.

Comments: 2007 335i with the n54 engine. Had the codes read and it was related to the knock sensor. I replaced the knock sensor and still have the check engine light. The sensor that I bought did not have new bolts so I used the old ones. I have seen that you should only use new bolts, could this be the problem and maybe the old bolts will not tighten up like they should?

Also I read in a repair menu that you should put the sensors in the same angle that the others where and I did not pay attention to that when I put the new ones in. Could that have something to do with the error code still being there? Sorry for the long thread but I would appreciate anyone’s help

Followup from the Pelican Staff: First it is possible that those items could have caused an issue with your new sensor, BUT I think you are probably OK. It could be a wiring issue. Perform a good visual inspection on the harness that is visible and make sure the connectors hold on to the sensors very well. You can always swap the two sensors and see if the fault follows the suspected bad sensor. – Casey at Pelican Parts

Followup from the Pelican Staff: Have the PCV system checked, there is a check valve in the valve cover that is supposed to prevent the car from "sucking" oil into the turbos under boost. That may be your issue. Crankcase vacuum at idle should be close to 7 inches of water. – Casey at Pelican Parts

Comments: Hi Nick. I don’t know which cylinders are misfiring but it seems that it is the timing at fault. Surely the knock sensor should have a reading on every cylinder? If there is no reading at all on 2 and 3 then could it be the knock sensor at fault?

Comments: Hi. My 2006 320i msport auto is misfiring when accelerating fro m the lower rev range. Ecu errors say catalytic converter and minimum valve lift exceeded, however, it has already had a new catalytic converter and motronic valve fitted. The live readings shown by the knock sensor indicate that cylinders 2 and 3 have zero values. Is this normal or is the knock sensor faulty?

Comments: Well it was Difficult to access the knock sensor for removal i had to take out the alternator to access the same ,it was not show in your description ? by the procedure shown by you it was not posssible to remove the knock sensor? it would be nice if you would add the same

Followup from the Pelican Staff: http://forums.pelicanparts.com/bmw-general-discussion/891864-hi-where-would-i-need-refer-nox-replacement-e92-2-0-petrol-error-p2205-nox-sensor-heater-control-circuit-open-bank-1-a.html – Nick at Pelican Parts

Comments: Good Afternoon, I threw a p1328 code on 07 e92 335i, which is the high input knock sensor, I understand there is a high and low input. Would I need to purchase two separate sensors? I noticed that an individual sensor connects at two locations. I wasn’t sure if one sensor was sufficient for the high and low. Thanks!