[BrokeN54]

My 335i N54 will not start and it is pissing itself in oil.
I am no mechanic nor do I know much about engines in general.

"Engine Malfunction" popped up so I pulled over and shut off the car. Tried to start it back up and it would not start. It wants to (kinda) but it just won't start.

Before my battery died I scanned the car and these codes popped up:

P0341
P142E
P0365
P0340

Please help if you have any idea how to resolve this issue and estimated cost.

[iqraceworks]

First thing would be to find out where the oil is coming from. You don't need to be a mechanic to do that......just use your eyes. That's the first step in figuring out what's going on .......

[BrokeN54]

Originally Posted by iqraceworks

First thing would be to find out where the oil is coming from. You don't need to be a mechanic to do that......just use your eyes. That's the first step in figuring out what's going on .......

Well yea I tried to look into it but I can't pin point where it's coming from

[mxchris727]

Have it towed to a shop. Don't try to start it again or you can risk damage from lack of oil/oil pressure.

[feuer]

Few timing fault codes and low high fuel pressure fault. Could mean many things: lack of oil doesn't move the vanos solenoids, skipped timing, binding moving parts due to lake of oil.....

[RayLivingston]

You seem to have several things going on there, and they are not necessarily related.

The oil leak is probably just an oil leak - most likely one of the common ones for these cars: oil filter block gasket, valve cover gasket, or oil pan gasket. The first two are relatively easy to fix. The third, not so much. But, if you're not used to working on modern cars, likely all of them are beyond your ability.

Next, you're getting a fuel pressure fault. This, too, is not unusual for these cars, and could be simply a bad sensor, which is not too hard to fix, or a failed high-pressure fuel pump, which is an expensive repair. Sadly, HPFP failures are common on N54s, when they get up to 70-100K miles. Again, probably not something you want to tackle yourself.

You have two exhaust cam position sensor faults. This is almost certainly due to a failed cam position sensor, which is an easy, and inexpensive repair. IIRC, the sensor is on the front of the engine, near the exhaust side, and is held in place by a single bolt. Remove the bolt, pull out the sensor, plug in the new one, replace the bolt.

Given that you admit to not knowing much about engines, the smart move here is to tow to to a shop that works on BMWs, but it is possible you may be looking at some expensive repairs:

Replacing the cam position sensor is probably on the order of $100-200. About the same if the fuel pressure sensor is bad. If the HPFP needs to be replaced, last I knew, that was on the order of $2000. Repairing a leaking oil filter block is probably $200-400. Valve cover gasket replacement probably $200-300. If the valve cover itself needs to be replaced (not unusual), add another $400-500 for the new valve cover. If the oil pan gasket needs to be replaced, I'd guess that is probably $1500-2500. If you go to a BMW dealer, almost double those prices.

Regards,
Ray L.

[gbalthrop]

Originally Posted by BrokeN54

My 335i N54 will not start and it is pissing itself in oil..."Engine Malfunction" popped up so I pulled over and shut off the car. Tried to start it back up and it would not start... these codes popped up:
P0340, P0341, P0365, & P142E...

Is your Serpentine Belt intact? That's the belt that drives the Compressor, Alternator, P/S Pump, etc. I would suggest taking several photos of the FRONT of the engine and attaching those photos here.

QUESTIONS:
0) Is your Serpentine Belt intact (see link below for Belt Diagram)?
1) Please identify ALL Warning Lights that appeared on the Instrument Cluster before you "shut off the car."
2) Were there ANY unusual Sounds, or Performance Symptoms, BEFORE the "Engine Malfunction" light came on?
3) Please describe what you are calling the "Engine Malfunction" light, and WHERE it appeared. Was if the "SES" yellow light? Was it the "Half-Engine" light? Was it on the Instrument Cluster?
4) Did the car have any "issues" affecting its performance BEFORE this event, and if so, please describe?
5) WHERE do you see any oil that has leaked from the engine? Is it on the front of the engine? Is it on the right side of the engine? Has it dropped onto the ground beneath the engine? Is your lower "Splash Shield" in place under the engine? Is there oil in the splash shield, and if so, WHERE?
6) Do you have a camera/phone that can take photos of any area of oil leakage? If so, please attach photo(s) of the leak.
7) Can you read "Freeze Frame Data" related to each of those FOUR Fault Codes? That FF Data will show Engine Conditions (Temp, RPM, Load, System Voltage) and MILEAGE when each of the codes was saved. That information would be VERY helpful to anyone trying to properly Diagnose your situation. Do NOT Delete or Clear those 4 codes, as the FF Data is still in DME (Engine Control Module) Memory UNTIL the codes are cleared, and someone with proper diagnostic equipment can read that FF Data.
8) Can you find a decent BMW "Indy" or independent shop near you that has INPA or ISTA Diagnostic BMW Software on a Laptop?

Diagram of N54 Serpentine Belt:
https://www.newtis.info/tisv2/a/en/e...lement/OjScn7s

I have "Re-arranged" your Fault Codes in numerical order, which also coincides with Components whose CIRCUITS are showing Faults. I emphasize "circuits" since those codes do NOT mean replace both Cam Position Sensors, or all Injectors, but rather a Fault, perhaps wiring or connectors, related to those components, or some condition that has caused the DME to "shut down" injector function.

The first two codes relate to Intake Camshaft Position Sensor CIRCUIT of SIGNAL as received by the DME. The third code relates to Exhaust Camshaft Position Sensor CIRCUIT, and the Fourth code indicates the DME has shut down or disabled Fuel Injector Function to prevent dumping of fuel into the Catalytic Converters, to prevent a FIRE in a Cat, or other damage to the Catalyst inside the converter. Here is a link to the BMW Fault Code Lookup Fault Information Sheet for that code:
http://www.bmwfault.codes/XMLDiagVie...cANQA5ADAANAA=

So check if your Serpentine Belt is intact, answer the questions above, and take/attach photos. We can then suggest Next Steps.

BTW, the reason I'm asking about the Serpentine belt is that single failure could account for at least 4 of your 5 issues (the oil leak is the 5th issue ;-). If the belt fails, it can flop around and damage the Cam Position Sensor wiring on the front of the engine, and also get wedged between the rear of the Crankshaft Pulley & Front Crankshaft seal, damaging the seal and causing an oil leak. Also, COULD cause Injector Shutdown due to lack of Cam Position Signal required to "time" injector pulse by DME. JUST a theory, but it is a SINGLE FAILURE which COULD cause ALL 5 Faults.

George

[BrokeN54]

Ended up blowing my motor

[iqraceworks]

Any more details? What actually came apart? It's pretty rare that an N54 just grenades itself. Did a rod come out of the block?

[Emilime75]

I think the real question is what was the oil leak that appears to have been the root cause of the engine failing?

[iqraceworks]

Originally Posted by Emilime75

I think the real question is what was the oil leak that appears to have been the root cause of the engine failing?

Or...was the oil leak actually caused by a catastrophic failure.

It's hard to know much when people say "it was a blown motor".....that's not much help really.

[Buug959]

Originally Posted by BrokeN54

Ended up blowing my motor

Please don't leave everyone hangin'... what happened to your engine? "Blown" doesn't mean anything over than it no longer runs.

[BrokeN54]

Originally Posted by LemansE90335xi

Please don't leave everyone hangin'... what happened to your engine? "Blown" doesn't mean anything over than it no longer runs.

Something about my crank bolt broke and messed up my internals

[Buug959]

Oh that sucks. Are you gonna search for another engine to swap in?

[BrokeN54]

Originally Posted by LemansE90335xi

Oh that sucks. Are you gonna search for another engine to swap in?

Yes just swapped to an 09' N54 with 47k miles on it runs fine right now, but having misfires on cylinders 1,2, and 3 probably due to a faulty o2 sensor (bank 1 sensor 2)

[Buug959]

Originally Posted by BrokeN54

Yes just swapped to an 09' N54 with 47k miles on it runs fine right now, but having misfires on cylinders 1,2, and 3 probably due to a faulty o2 sensor (bank 1 sensor 2)

Cool. Keep the N54's going. And an O2 sensor is a lot easier to fix than a lunched bottom end.

[BrokeN54]

Originally Posted by BrokeN54

Yes just swapped to an 09' N54 with 47k miles on it runs fine right now, but having misfires on cylinders 1,2, and 3 probably due to a faulty o2 sensor (bank 1 sensor 2)

Here are some codes I've gotten

[Buug959]

I'm not going to be much help to you with codes. I haven't owned any BMWs before the one I have now and I just got it in July. I'm sure some others on the forum will chime in with some experienced advice.

[iqraceworks]

Originally Posted by BrokeN54

Something about my crank bolt broke and messed up my internals

I'd be really curious about the details if a shop told me that. Did you get to inspect the motor after you pulled it out. What crank bolt are they talking about? A crank journal bolt? Even with "messed up internals".....what caused the massive oil leak? Did something
come out the side of the block??

I just don't trust shops......way to many bad ones out there that try to screw people over.

[BrokeN54]

Originally Posted by iqraceworks

I'd be really curious about the details if a shop told me that. Did you get to inspect the motor after you pulled it out. What crank bolt are they talking about? A crank journal bolt? Even with "messed up internals".....what caused the massive oil leak? Did something
come out the side of the block??

I just don't trust shops......way to many bad ones out there that try to screw people over.

I've had 4 different mechanics ask me "what did you do?!?" They all told me the same thing. I need to either cut my losses or put in a new motor. 2 of the 4 mechanics were family friends and the other 2 were reputable shops in the Bay Area. I didn't really inspect it when the motor was out. I just knew that I did not want this to be the end.

[iqraceworks]

I guess we will never really know what happened.....