limp mode on my 328i 2007

[dworthy]

What is up with people not reading the thread? Eboneej, you are the second person to ask if it got fixed, I think the OP is not coming back to the forum, sorry.

This is what you need to do: Get a real scanner, as the "P" code is not accurate, get the car scanned by a BMW diagnostic equipment ISID/ISIS or similar.

Oh and normally this is caused by owners not using the proper oil in their BMW's and the VVT getting clogged.

[bmwdirtracer]

No one here believes in P-codes, eboneej, because they are nonsense translations invented by bureaucrats, to describe emissions-related issues , not the actual BMW trouble codes. To make matters even worse, these numbers are usually read by dime-store code readers, and translated by a paper chart, or perhaps a Chevy truck owner, via Google.

I wouldn't begin to believe this information, but hey, if you want to try:

p1056 SEEMS to refer to electrical failure of the valvetronic motor power supply circuit. The power and ground for this delivered from the DME connector x60004, pins 3 and 5 are ground, pins 4 and 6 are power. (Assuming you have a 2007 E90 4 door with an N52 engine)

Did that help? Or do you still need a BMW guy with a BMW computer?

[jimmy66]

I am having the same problem code p1056 did you ever take it to a shop? What was wrong? Please reply

did bobby ever fixed his car?

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i have 2009 bmw 328ix with the code p 1056 and 105b can anyone help me please! thank you

[jimmy66]

can you help me bro?

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i don't think bobby fixed his car yet...cuz I see him on other web pages looking for help on the code 1056 and 105b

[bmwdirtracer]

Welcome to the forum, Jimmy.

This thread is two and a half years old, and Bobby hasn't been back, in all that time.

Still, since you've read the thread, you'll know that everyone who's answered has said that a professional diagnostic scanner is needed, because P-codes are USELESS for diagnosing BMWs.

Now, I did use a professional resource to look up the code numbers you gave, as they relate specifically to your car, and I'm going to copy that, below.

However, let me be very specific: If you brought the car to my shop with these codes, I would have to connect the car to ISTA (BMW's own diagnostic computer), and follow the factory test plan. No other course of action is sufficient, for these codes.

Take the car to a BMW specialist pro shop which has ISTA. (Ask, before you make the appointment) All BMW dealerships have ISTA, of course.

Here is the professional description of the code:



2A77 - P105B

Information saved in
DME

Fault code
2A77 - P105B

Fault text
Control module, internal fault: Valvetronic output stage

Fault description
Internal Control Module VVT Error, VoltageToo Low

Condition for fault identification
Test condition:
Undervoltage in power supply to driver circuit has been
detected (ATIC61 diagnosis)
Terminal condition: Terminal 15 ON
Voltage condition:
Battery voltage > 9.953125V and battery voltage <
25.898438V

Condition for fault memory entry
0.2

Action in service
1. Ignition off, let control module return to dormant state as
indicated, restart
2. If Item 1 is not OK, it will be necessary to check the
electronics in the control module

Fault effect and breakdown warning


Driver information
Warning light:
Fault entry in info memory only

Service instruction
none

[jimmy66]

hello did bobby ever get back to you on the 1056 code? I need help with my car as well! please help me out! thank you email jimmyvega666@gmail.com

[bmwdirtracer]

Did you read what I just wrote?

There is nothing else to tell you.

[tomi3h]

Hi all, just to bump this thread a bit. 2010 E90 sedan x drive plain Jane no mods.
I did a valve cover gasket replacement yesterday, that's a whole other story, and when all was back together I was getting the P1056, P105B codes and the car was in limp in mode. Grrrr, I went to bed. This morning I got up and started looking on line and discovered this is a common pair of codes that turns up after jumping the car or doing other work. I found this thread on another forum, https://www.1addicts.com/forums/show....php?t=1125039, that and based on 'dirtascer's post, it's always nice to get a complete readout, I fixed it. Zerofire, the guy on the other post had the fix.

On top of the battery there is a module that has several fusible links and one of them was open. In my case as soon as I saw the other post I knew I had to check it. Why, because at one point in doing the valve cover job my wrench had shorted out to the the "jump start" connection. Yes I had removed the cover over the connection from the battery to get the wrench in, bad/dumb move. Any way as I said after removing module from the top of the battery and opening it up the fusible links were obvious and a quick check with a ohm meter showed that one was open. I effected a temporary repair to the link that was open. Put the module back on the battery, hooked it up, and started the car. Both codes were gone car runs fine.

The moral of the story, anytime these codes turn up check the extra wires coming out from the module on top of the battery. Next step down the road there is a relay in the ECO box directly related to the VVT, another place to check.
Good luck to all, and keep on wrenchin'.

[eman2007]

Why didn’t you disconnect the positive on the battery before you started on the valve cover gasket?