Help, E36 Won't start- Key not recognized!?!
 

After feeling exceptionally accomplished by completing the oil nut secure procedure on my 98 M3 (yep the nut was in the bottom of the pan). I was excited to start her back up. Problem is all dashboard lights came on like normal but no crank (could hear what I assume was the fuel pump pressurizing). Battery is great, charged full, all accessories work. I have carsoft so read the codes and I got 235 and 236 "Heat Output OX sensors" errors but assume that is just because the engine is not running. The one that I think is the problem is "EWS Key Transponder in Key...Key not recognized". The car was working perfectly fine, except for the zero oil pressure which prompted the job in the first place. Any ideas on what to do? What should I check? Because I only had one key when I bought this car I just got back from the dealer and ordered a second key because of the above error but the tech at the dealer wasn't overly confident that the key went bad (and seems too much of a coincidence the key would have gone bad). Might I have knocked off some plug or with the battery dead and unplugged for about a week could the key or car need some type of programming? My son had the ignition turned on for about a week so the battery went COMPLETLY dead. The key does not have any buttons on it other than one to turn on a little light. HELP!:eek:

Don't know if this helps anyone. This is the error readout from DME and WDS, does it mean a sych problem if the code index's are different??:

Single diagnosis DME / DDE - Status: ERROR ! ______ _____" Module Info : DME / DDE ______ _____
DME MS41.0 ______ ____!
BMW Part Nr. : 1406464 !
Hardware Nr. :_ 02 ____!
Software Nr. :_ 12 ____!
Diagnose index:_ 21 ____!
Code index :_ 01 ____!
Bus index :_ 10 ____!
Production Date: 41/97 _____ ______ _
DME41_FE.DXT
_____ _____.
236 Heat output : oxygen sensor Bank 2______ _____
1 At cylinder 4-6; after catalytic converter______
- oxygen sensor heating_____$
- cables to the oxygen sensor_____,
- Final stage of the DME control unit______ ______ ______ ______ ______ ______ _____0

250 Tank venting valve : Function fault ______ ______ ______ ______ ______ ______ _____.
235 Heat output : oxygen sensor Bank 1______ _____
1 At cylinder 1-3; after catalytic converter_____!
Open or short circuit at :______
- oxygen sensor heating_____$
- cables to the oxygen sensor_____,
- Final stage of the DME control unit______ ______ ______ ______ ______ ______ ______ - Single diagnosis completed !_____M___________________________________________ ________________________________________ _____

P Single diagnosis EWS - Status: ERROR ! ______ _____" Module Info : EWS ______ _____" Supplier : _UTA ____!
Device Nr. :4 146 048 ____!
Hardware Nr. :_ 2 ____!
Software Nr. :_ 2____!
Diagnose index:_ 1 ____!
Code index :_ 2 ____!
Bus index :_ FF ____!
Production Date: 41/97 _____ ______ _
ews_feh.dxt: _____ ______

01 Key 1 not recognised______ _____9
Key recognising procedure during the start process : ______ _____D - The transponder in the key is supplied true the ring antenna. _____4 En sends the key data to the EWS control unit._____@
- The EWS control unit controls the data, and then sends the_____< permission signal to the engine control unit (DME/DDE)______ en de starter._____=
- After starting the EWS control unit calculates new data_____G (changing code) and the sends it to the transponder into the key.______ ______ ______ ______ ______
- Single diagnosis completed

Problem solved. Turned out the oil nut replacement went without a problem but fixing the damaged motor mount required removing the engine arm and taking it to a shop to have the broken part removed from the arm. When reinstalling it I get 50 demerts for breaking the main ground. 300 for the garage to tell me why it wouldn't start. Small victory at least, much cheaper than if they would have fixed the oil pump for me...oh well.