Limp Mode - Many codes

[Ozer]

Originally Posted by jfoj

Stop with the parts replacement at this point.

Thanks for the help.
2011 x5d 105k miles on it, dealer serviced till 100k under warranty.
I have the Carly app with their dongle so thats where im getting the codes and i can see live data with the parameters screen.

[jfoj]

Originally Posted by Ozer

Thanks for the help.
2011 x5d 105k miles on it, dealer serviced till 100k under warranty.
I have the Carly app with their dongle so thats where im getting the codes and i can see live data with the parameters screen.

You need something other than Carly, not impressed with this App for driveability.

You should be able to use the wireless device that you are using for Carly with either Touch Scan for Android or OBDFusion if iProducts.

I would like see Freeze Frame info and a Log.

Here is my problem, do not have much BMW Diesel experience, however, I do have a LOT of experience across many makes and models.

What I can say is unlike many of the current models, the MAF on your car is a 3 wire MAF and does not have the IAT integrated into it.

Since you are seeing both MAF and IAT problems, I would expect there may be something common across these.

BUT, I HIGHLY recommend either Touch Scan or OBDFusion depending on your platform, assume you are running Android so Touch Scan is only $5.

[Ozer]

Originally Posted by jfoj

I HIGHLY recommend either Touch Scan or OBDFusion depending on your platform, assume you are running Android so Touch Scan is only $5.

Ok i will get that now and test it out later today, whats another $5 at this point :p I will report back,m thanks for the help man, appreciate it.

[jfoj]

No problem.

While Carly has its merits, like MANY vehicle specific tools it FALLS ON ITS FACE when it comes to OBDII support.

I think you will find Touch Scan an eye opener and with both tools hopefully you can gather the data to see what is going on.

I will attempt to get you through part of the learning curve with Touch Scan so others here can see what is going on.

Also set up a DropBox Free account if you do not have one. DO NOT DOWNLOAD AND INSTALL THE DROPBOX SOFTWARE ON YOUR COMPUTER, SKIP THIS.

Then enter your DropBox user name and password in the App under DropBox and you can seamlessly upload the Logs and then share them with the URL link from DropBox.

[Ozer]

Air intake temp shows -40c as the car was idling, that seem right?
I already replaced this sensor with a new one couple weeks ago.

[jfoj]

Originally Posted by Ozer

Air intake temp shows -40c as the car was idling, that seem right?
I already replaced this sensor with a new one couple weeks ago.

This is what I am getting at, being able to see the data makes a difference. Touch Scan should be able to read this as well, but the problem/key issue is if you can Log the data stream you can then see if this value reads correctly, then jumps to -40C.

If the sensor is easy to access, I would disconnect it and see what temp value is displayed, then put a jumper across the connector to see what value is displayed.

One way should be a - (negative) extreme, the other way should be a + (positive) extreme. If unplugging and putting a jumper across the connector does not change anything, there is then likely a wiring problem, assuming there is not coolant/water damage back at the DME connector, which I do not know as a problem with these models, but it can happen.

Chances there is a common connection point that is broken or damaged? But I do not have a wiring diagram handy. Might try and see if Workshop Manuals has anything online.

A test light, not an LED version, might be a good tool to check for a ground and/or supply a resistive signal back to the DME, but be careful with this and make sure you understand how the circuit works before you try this.

Example of DME coolant damage - Fuel injector, possible DME issue? HELP! - E46Fanatics

[Ozer]

Took it to a trusted BMW indy shop and they said the software is the original, 2-9-2010 and said getting the update may fix these issues.
Anyone have an input on this? Im going to ask the dealer if they can do it as a courtesy since the car was bought and serviced from there all its life.

[jfoj]

Doubt the DME/DDE update will resolve your current problem. DME/DDE software would have been a problem far before 100k miles.

Also do not expect the dealer to do this as a courtesy, maybe they will but expect around $200, which in my opinion is on the high side.

You need to figure out why the IAT is reading -40C, my guess is a broken wire/bad connection? This also be impacting the MAF reading as well, there may be a common problem that impacts both sensors.

[Ozer]

Originally Posted by jfoj

Doubt the DME/DDE update will resolve your current problem. DME/DDE software would have been a problem far before 100k miles.

Also do not expect the dealer to do this as a courtesy, maybe they will but expect around $200, which in my opinion is on the high side.

You need to figure out why the IAT is reading -40C, my guess is a broken wire/bad connection? This also be impacting the MAF reading as well, there may be a common problem that impacts both sensors.

I traced the wires from the sensor and didnt see anything and all the connections clip in nicely, not sure what the issue is. Grrr!!

[jfoj]

For the IAT, 2 tests.

Disconnect and leave the sensor connector free/disconnected. See what the temp states.

Put a jumper across where the sensor would be. See what the temp states.

One way you should have the -40C, the other way you should have a max value, not sure what this would be, maybe something like 115-120C/

You should be able to see 2 states. I just do not know if the IAT sensor is Positive or Negative Temperature Coefficient. You can try research this and then figure if there is a wiring or sensor problem.