[4seriesNL]

I have a jb4 catless downpipe intake and mpe.
This code showed up today. Anybody have an idea?

[XutvJet]

That last code is alarming. Are you low on oil? I would not drive the car hard at all if oil pressure is too low. That's something that definitely needs to get checked out.

Is you check engine light on? If so, what is the car telling you to do?

[4seriesNL]

Originally Posted by XutvJet

That last code is alarming. Are you low on oil? I would not drive the car hard at all if oil pressure is too low. That's something that definitely needs to get checked out.

Is you check engine light on? If so, what is the car telling you to do?

Check engine came on but car never told me to do anything. Oil level is fine

[amw896]

oil pressure is a huge deal. Definitely do not drive it. Does jb4 have a oil pressure monitor?

[4seriesNL]

Originally Posted by amw896

oil pressure is a huge deal. Definitely do not drive it. Does jb4 have a oil pressure monitor?

Not sure if it does it not.
I was just cruising on the highway after startup when it came on along with the code because of my catless dp. It's was about -40 degrees Celsius that morning so not sure if that has anything to do with it.
Been driving the car since with no issues.

[amw896]

Originally Posted by 709M240i

Not sure if it does it not.
I was just cruising on the highway after startup when it came on along with the code because of my catless dp. It's was about -40 degrees Celsius that morning so not sure if that has anything to do with it.
Been driving the car since with no issues.

-40c?!?! Bro I'm in canada too but damn that is cold ... Very well could have been a frozen sensor

[4seriesNL]

Originally Posted by amw896

-40c?!?! Bro I'm in canada too but damn that is cold ... Very well could have been a frozen sensor

I'm thinking it was too.
Last few days has been extremely cold.
I've been driving fine for about 60km not far but no signs of anything bad. Temps have been rising. -25 today

[amw896]

nice, definitely check the gauge dashboard for oil pressure readings, jb4 should have one as most flash do. I monitor it along with critical temps.

[MarcoZandrini]

That -40*C reading is from the external ambient air temperature sensor. It’s disconnected or missing.

[XutvJet]

If temps are that low, you really shouldn't drive the car hard as the oil will take forever to get up to an optimal temp for hard driving (180 F at a minimum). I'm not sure the oil could ever get up to temp in temps that cold.

[aerobod]

Originally Posted by XutvJet

If temps are that low, you really shouldn't drive the car hard as the oil will take forever to get up to an optimal temp for hard driving (180 F at a minimum). I'm not sure the oil could ever get up to temp in temps that cold.

At -30°C the M240i takes about 2km longer than usual to get to 100°C oil temperature - about 10km vs 8km at temperatures around 0°C. It has as good heat management for warmup of any vehicle I have ever owned.

[Tony88]

Even with oil pan heaters plugged in all night, I wouldn't start and drive my car any colder than -20F. If it sits in a garage all day/night I've driven mine all the way down to -50F no problem. I'm sure if you don't have heaters on the pan, it just doesn't like starting and running with the thick cold oil. Are you running 0W-30?

[4seriesNL]

Originally Posted by Tony88

Even with oil pan heaters plugged in all night, I wouldn't start and drive my car any colder than -20F. If it sits in a garage all day/night I've driven mine all the way down to -50F no problem. I'm sure if you don't have heaters on the pan, it just doesn't like starting and running with the thick cold oil. Are you running 0W-30?

Whatever bmw uses is what I would have.
No heater.
It was about -25 but a windchill close to -40.
I cleared it and it hasn't came back yet.

[aerobod]

Originally Posted by Tony88

Even with oil pan heaters plugged in all night, I wouldn't start and drive my car any colder than -20F. If it sits in a garage all day/night I've driven mine all the way down to -50F no problem. I'm sure if you don't have heaters on the pan, it just doesn't like starting and running with the thick cold oil. Are you running 0W-30?

I’ve had no problems running or starting any BMW I have had over the past 20 years with the standard oil fill when left outside overnight down to -35°C (-31°F) actual temperature - wind chill only affects how quickly a car will cool down, once it reaches the ambient temperature it has no affect on the car starting. My Z4M used 10w60 standard fill, too, and started fine without any assistance from oil pan, battery or any form of coolant heater.

[Tony88]

Originally Posted by aerobod

I’ve had no problems running or starting any BMW I have had over the past 20 years with the standard oil fill when left outside overnight down to -35°C (-31°F) actual temperature - wind chill only affects how quickly a car will cool down, once it reaches the ambient temperature it has no affect on the car starting. My Z4M used 10w60 standard fill, too, and started fine without any assistance from oil pan, battery or any form of coolant heater.

Man, you're ballsy lol. I wouldn't even attempt to start anything I cared about that cold without any heaters on it!

Back when the only car I had was my 01 325ci, I had two oil pan heaters on it and even then, starting it around -40, it would backfire, idle low and make some strange noises for a few minutes. I just made the decision when I bought the 235 that I wouldn't start it below -20 just to hopefully reduce the wear and tear on the car since I plan to keep it awhile.

[aerobod]

Originally Posted by Tony88

Man, you're ballsy lol. I wouldn't even attempt to start anything I cared about that cold without any heaters on it!

Back when the only car I had was my 01 325ci, I had two oil pan heaters on it and even then, starting it around -40, it would backfire, idle low and make some strange noises for a few minutes. I just made the decision when I bought the 235 that I wouldn't start it below -20 just to hopefully reduce the wear and tear on the car since I plan to keep it awhile.

I don’t have much option when I’m away from home in winter, for example in Edmonton or Banff, usually have to park outside and deal with whatever temperature it happens to be.

Our 2000 323Ci didn’t misfire or run roughly when started in the mid -30 range, but it did weep fuel very slightly below -30°C (enough to smell but not see fuel running) for about a minute after starting until the ‘o’ rings on the injectors warmed up enough to reseal themselves. Our 2010 135i would sometimes throw a misfire code below -25°C that would clear itself, if I drove off right after starting, but waiting 30 seconds or so before driving off would alleviate that. I’ve only started the M240i after sitting in -30°C weather so far as it hasn’t been too cold the last two winters, but it doesn’t have any problems at that temperature.

I know some Canadian cars have had larger capacity batteries than US cars in the past, our 135i came with a 90Ah battery compared with 70Ah on the US cars, although perhaps Alaska also got the bigger one?

[Tony88]

Originally Posted by aerobod

I know some Canadian cars have had larger capacity batteries than US cars in the past, our 135i came with a 90Ah battery compared with 70Ah on the US cars, although perhaps Alaska also got the bigger one?

I doubt it, all our cars up here are just standard US spec. I've never really had any problem with batteries in the cold though. One annoying thing with my 235, all winter long it gives me low battery warnings. It's never died, cranked slowly or tested low but, the car constantly thinks its dead. Kind of annoying when it shuts the comfort access off and I come out of a store or something and I have to hit the key fob. First world problems, I know

So do businesses and employers not have places you can plug in there in Canada? Around here, most places have headbolt outlets that people can plug their cars into and most everyone has block, oil and trans pan heaters on their vehicles.

[4seriesNL]

CEL came on again today(scared me)
But the only code was for my catless downpipe.
I guess that is a good sign.

[dradernh]

Originally Posted by Tony88

So do businesses and employers not have places you can plug in there in Canada? Around here, most places have headbolt outlets that people can plug their cars into and most everyone has block, oil and trans pan heaters on their vehicles.

IIRC, the gigantic West Edmonton Mall had electricity available at (every?) parking spot when I was up there in 2001.

I was just a little kid, but I still remember my mom calling my dad at work in Bismarck to tell him that the carport thermometer was reading -40° F/C. She wanted him to go outside and make sure his car would still start. Under conditions as brutal as those, it's a wonder we survived!

I lived in North Dakota, Wyoming, and Montana as a kid and can well imagine the benefits of having already-warmish fluids when returning to a car after it's been parked outside for a while. The wind never stopped blowing in those states, and it was especially strong and constant in Wyoming, where cowboys lined up at the bars at their 6 AM opening before heading out onto the range. But I digress...

[aerobod]

Originally Posted by Tony88

So do businesses and employers not have places you can plug in there in Canada? Around here, most places have headbolt outlets that people can plug their cars into and most everyone has block, oil and trans pan heaters on their vehicles.

They do, but I’ve never bothered fitting a plug-in heater with not having starting issues with any of my vehicles when using a good synthetic oil with a low pour point. I also tend to park away from other cars in the corner of parking lots where they are less likely to have plug-in sockets.

[morphomeman]

Catless downpipes are illegal everywhere, except for track use.
If you are seeing a code, then BMW is doing its job, thank god.
Save the planet!

[delvec03]

Originally Posted by morphomeman

Catless downpipes are illegal everywhere, except for track use.
If you are seeing a code, then BMW is doing its job, thank god.
Save the planet!

-15 points, general concept error
-10 points, statement not applicable

post grade "C"