M5/M6 fault codes, throttle actuator, steering angle sensor?

[malone67]

Evening all,

Driving along as normal the other day in my e63 M6 and engine management light came on, few minutes later car goes into limp mode with DSC failure and start assist failure. Drove home panicking and was online most of the night trying to find what it could be.

Next day, no lights nothing, driving as normal until reach optimum engine temperature and straight up engine management light and limp mode DSC failure at same time.


Took car to my local garage the next day and no lights were on, car drove great as normal. He gave me the fault codes

2B15

2B57

5E19

So i type these into various websites, m5board etc

Ive seen various comments of...
its the steering angle sensor, just needs cleaning and putting back
its the throttle actuator needs replacing
there may be some loose wires.

So took it back the garage, opened the car up and looked into it more, he said he cant see a problem with the actuator bank 1.(although from photos ive seen online you wont see a fault/wear unless you look right inside it), he cleared the codes and for two days the car brought no engine management light, no limp mode, i thought great must of been a loose wire or something, gave it a good boot and made sure i was right upto temperature etc but still no limp mode.

Driving along today and after about 5 minutes from cold it went straight into limp mode, i switched it off and on straight away, limp mode and DSC vanished but the engine management light stayed on. Again after 5 minutes DSC failure lit up again, turned car off and on again and again it vanished, still with engine light on though.

I just need some guidance as to what this is because reading all other fourms to do with these fault codes theres at least 4 different things it could be. People have even took theirs to main dealers and had thousands spent before they even realised it was the throttle actuator , f*** that!

What im struggling to understand is if it is actually the throttle actuator that needs replacing, surely i would be able to tell with the power of the car, or it would stay in limp mode until i had it fixed, when not in limp mode the car is as normal, full power available and everything seems fine. - how / why did i go 2 full days of giving it beans with no flashing fault lights?

before i start replacing these parts which are obviously expensive bought new i thought id see what you guys know

many thanks,
malone67

[malone67]

Cheers The End,

I knew the first code was bank 1 actuator but they told me different explanation for the other two

i got - 2b57 safety concept manager -
5e19 CAN engine ECU

Everything seems to be pointing to replacing the bank 1 throttle actuator, i just dont get how if it is dead, how the car can run as normal for certain journeys, then throw me into limp mode, then again back to normal.

[malone67]

Thanks jolley

I pmd alpine about it a few days ago just awaiting a reply. The rpms are at 4500 yes, I have only been the shops and back in the last few days and limp mode has not appeared at all. Probably because I drove it like it was.

[malone67]

R-spec

Seems to be different for all, i didnt bother getting the gears changed/refurbished, because i wasn't willing to wait/have car off the road for a few days.

I bought a 2nd hand actuator and replaced bank 1, been 2 weeks now and im back to having fun again!

Might get rid soon as im out of warranty and get a sweat on every time it beeps at me (below 3oC) thinking something is wrong. However what to get next is a real head scratcher for me!