Fault code 0x27A2 - BMW M5 Forum and M6 Forums
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post #1 of 24 Old 23rd September 2013, 07:25 PM Thread Starter
SvenM5
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Fault code 0x27A2

Hi all,

I have a fault code and get the reduced power massage.
0x27A2 drosselklappensteller enable-leitung bank2
P157F drosselklappenfreigabeleitung schaltkreis(bank2) leitungsunterbrechung

Anybody knows what this is?

Thanks
Sven
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post #2 of 24 Old 23rd September 2013, 08:07 PM Thread Starter
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Okay it seems to be the throttle sensor. Anybody knows where it is , is it near the actuators?

Thanks
Sven
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post #3 of 24 Old 24th September 2013, 01:11 AM
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Throttle actuator, left side. Not the position sensor.

Fault code 0x27A2-screen-shot-2013-09-23-7.10.47-pm.png

Last edited by jcolley; 24th September 2013 at 01:13 AM.
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post #4 of 24 Old 24th September 2013, 06:14 AM Thread Starter
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Thanks jcolley!
I did a search and came to this thats why I assumed it was the sensor


Quote:
Originally Posted by Miguex View Post
UPDATE!

If your car has an error code 27A2 or 27A1, you have a faulty Throttle Sensor in bank 1 or bank 2, replace the part ($127). Labour free if you do DIY. (about less of 1 hour).

BMW Part: 13627841705

RealOEM.com * BMW E60 M5 Throttle Housing Assy (number 6)
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post #5 of 24 Old 17th October 2015, 03:19 PM
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Yes I've replaced the Throttle sensor but still showing same fault so it must be the actuator
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post #6 of 24 Old 17th October 2015, 03:52 PM
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Fault code 0x27A2

Before you buy a new TA, what it specifically complains about is the enable line into the TA. In German it says it is interrupted. This enable line comes from the DME through the harness. It may just be a harness wire integrity issue when you ruffled it feathers under the hood. The way to check this is by switching the TA in place and see if the problem moves to the other side. If it stays it is the harness if not it is the TA.

Last edited by rt7085; 17th October 2015 at 03:53 PM.
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post #7 of 24 Old 17th October 2015, 05:18 PM
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I'd use DIS or similar software to clear the code and then go a diagnosis test to check the throttle actuators to confirm.

-Khánh
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post #8 of 24 Old 18th October 2015, 03:22 PM
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Thanks guys. rt7085 it was showing this fault before we ventured under the hood. 2Live4 cleared codes and and 27a2 plus new one 27af ???
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post #9 of 24 Old 18th October 2015, 04:06 PM
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Measure Impedance

Quote:
Originally Posted by Proudluke View Post
Thanks guys. rt7085 it was showing this fault before we ventured under the hood. 2Live4 cleared codes and and 27a2 plus new one 27af ???
That is very interesting. Well, it is either the harness and/or the ENABLE line. Somehow the DME runs a diagnostic check on this line, probably an impedance check. Internal to the TA this line leads to a comparator. On the bench I verified that this line does not turn off the TA. I think it just tells the TA not to function/move. The micro processor senses this line and makes a decision. I measured the expected resistance to GND and it is 102kOhms, verified on 2 units that work properly. Measure between pins 1 and 3 on the TA. See attached for TA pin numbering.



Larger than 100 kOhms is a design issue! Any PCB contamination or a compromise of wire insulation will reduce this value considerably and the diagnostics on the DME side probably trip up. Not sure at what exact value. Again, switching the units will reveal if it is the harness or the TA beyond the pin measurement.
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post #10 of 24 Old 18th October 2015, 04:08 PM
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