[C4maro]

Has a knock sensor ever saved anyone?? Seems like they've just annoyed us

[beems58]

Originally Posted by ///Motivated

Searched and found several threads with 2e69 codes on this and other forums. My car is doing what the others did where it throws that code and reduced power while cruising. The resolutions I saw were a busted engine due to hydrolocking with water/meth and a cylinder with low compression. My engine is stock and runs great. It has a light lifter tick that I wouldn't think would turn cause an errant reading. It has had the tick for a while but the code is new. I changed the sensor but the code is still being set. Any advice?

Has anyone found a solution?

[beems58]

Originally Posted by gbalthrop

The BMW FC 2E69 indicates a fault in the Double Knock Sensor OR its wiring/connectors between the two sensor "pickups" (on the Left side of the block) and the DME Connector X60005 on the N54 engine or X60002 on the N55 engine. Here is a Web page discussing P1327:
https://www.autocodes.com/p1327_bmw.html

There are THREE P-codes associated with the single 2E69 BMW FC: P1327, P1328 & P135B. Each of those codes have a definition related to the signal received by the DME from the Double Knock Sensor, and that signal is affected by wiring & connector faults. ALWAYS check wiring and connectors for faults including loose, damaged or corroded connectors BEFORE assuming the sensor has failed.

So check the connectors and wiring between the sensor unit and the DME. Here is the TIS circuit diagram for the N54 Engine:
https://www.newtis.info/tisv2/a/en/e...ontrol/oqj6nek

Here is the TIS circuit diagram for the N55 engine:
https://www.newtis.info/tisv2/a/en/e...ntrol/CkNJ0Bkn

It would be helpful to put full vehicle identification (model, year, chassis & engine) in your Member Info, or at least in your post.

George

Hi George I'm having the same problem and that link with the p codes will help a lot if I can get acces to the diagrams because I'm having the same code fault with 3100 deactivation coming on the same time any help will be appreciated!


Thank you!

[beems58]

Originally Posted by Pladi

Phenomenal response sir ! Thank you. If i was OP id be mailing you a 6 pack right now.

Hi George, do you have the diagram? I'm experiencing the same code. Wondering if my wiring is a problem.

[a.juarez54]

im having the same problem with this knock sensor keeps coming up and 3100 deactivation comes up cant solve it

[AG335xi]

Originally Posted by ///Motivated

Here's the update. Look at freeze frame data (if your OBD provides it). For mine it showed only one cylinder of the bank was giving a problem. Rules out sensor as the problem. Mine was a failed lash adjuster allowed cam-to-roller ticking (vibration) that was triggering the sensor. The sensors job is to "listen" for knock by sensing vibration and it was sensing that mechanical vibration.

Turns out the roller rocker was trashed and the cam lobe had some pitting. New lash adjuster, roller rocker and an eBay cam, and just did a 350 mile trip with no check engine codes.

So when I check the freeze frame, I'm getting "Voltage knock values cylinders 1 and 3 .16V" The knock sensor is brand new from FCP Euro and I don't feel like taking the manifold off again lol smh. I have new Vanos solenoids ready to go in but I hear that may not solve the Issue. I just changed the injectors for cylinders 1, 2 and 3. The injectors for 1 and 3 are new remanufactured from FCP Euro as well. Injector 2 is used. Installed and coded properly. Could I have gotten a dud sensor? Should I try swapping injectors? BTW just did walnut blast this past weekend.