Case Study:8725 / P17F9 - Park-Lock - Mechanical Malfunction

[Jef]

ST?ID=93172

Vehicle Identification No. WAUAVAFD5BN014***
Model Audi A8 qu. 4,2
A8Q
Date of production 14.01.2011
Model year 2011
Sales type 4H25AA
Engine Code CDRA
Transmission Code MXR

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Address 02: Auto Trans (J217) Labels:| 0BK-927-156.clb
Part No SW: 4H1 927 158 AD HW: 0BK 927 156 K
Component: 0BK 42 FSIUSA H08 1006
Revision: --H08---
Coding: 000002
Shop #: WSC 05140 444 83910
ASAM Dataset: EV_TCMALX51011 002018
ROD: EV_TCMALX51011_002_AU64.rod
VCID: 72A8DDE9A578421604-8026

1 Fault Found:
8725 - Park-Lock
P17F9 00 [167] - Mechanical Malfunction
MIL ON - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 93516 km
Date: 2020.04.10
Time: 18:28:16
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The shop that got this, car towed in with a dead engine, so this code was ignored. Customer had engine fixed and now stuck on this code. The only information for P17F9 is to say it exist, no relevant information.

The Emergency Release Cable for park has been pulled. The wut wut? So this car uses one of those stupid bump up/down gear selectors. There is not a traditional mechanical cable from the gear selector to the transmission to engage park. If one needs to get the car out of park (dead battery for example), there is the Emergency Release Cable to mechanically pull the transmission out of park.

To access the release, remove the floor mat and then remove a plastic cap. The plastic cap should have a red nylon strap securing it to the lever.

Once the release lever was folded back down and a second piece snaps into place to secure it, the tech was able to get the fault code cleared out after starting the car and operating the gear selector. Information on latching it back into place is in the factory repair manual, but the tech indicated it was pretty simple to do.

So it appears that another shop that had looked at this car pulled the release, then covered it all back and said nothing about it. So then the second shop got this and with no info to be found for P17F9... well.. confusion. Not like I knew about this until I looked into it and stumbled into the fix.

Thanks to the tech Adam for sending these photos to be shared so the next poor soul who gets P17F9 can now find some actual information about it.

 

[Jef]

When found in a 7-Speed Dual Clutch Transmission (0CJ, 0CK, 0CL, 0DN, 0DP):

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Address 02: Auto Trans (J217) Labels:| 0CJ-927-156.clb
Part No SW: 80A 927 155 CS HW: 0HK 927 156 B
Component: 0CJ 20TFSINAR H01 0001
Revision: --H01--- Serial number: 0000002737 CVN: 75F132D2
Coding: 000001
Shop #: WSC 00000 000 00000
ASAM Dataset: EV_TCMDL382021 002036
ROD: EV_TCMDL382021_AU49.rod
VCID: FCB45D5B77BF21711F-80A8

MTF pump:
Subsystem 1 - Part No SW: 0CK 927 152 AA HW: 0CK 321 281 M
Component: V553 MTFP 003 0582
Serial number: 75290041200315002821

1 Fault Found:
22345 - Park-Lock
P17F9 00 [10100111] - Mechanical Malfunction
MIL ON - Not Confirmed - Tested Since Memory Clear
--------------------------------------------------------------------

This can be caused due to low fluid level in the transmission.

 

[rodi_abbas]

When found in a 7-Speed Dual Clutch Transmission (0CJ, 0CK, 0CL, 0DN, 0DP):

--------------------------------------------------------------------
Address 02: Auto Trans (J217) Labels:| 0CJ-927-156.clb
Part No SW: 80A 927 155 CS HW: 0HK 927 156 B
Component: 0CJ 20TFSINAR H01 0001
Revision: --H01--- Serial number: 0000002737 CVN: 75F132D2
Coding: 000001
Shop #: WSC 00000 000 00000
ASAM Dataset: EV_TCMDL382021 002036
ROD: EV_TCMDL382021_AU49.rod
VCID: FCB45D5B77BF21711F-80A8

MTF pump:
Subsystem 1 - Part No SW: 0CK 927 152 AA HW: 0CK 321 281 M
Component: V553 MTFP 003 0582
Serial number: 75290041200315002821

1 Fault Found:
22345 - Park-Lock
P17F9 00 [10100111] - Mechanical Malfunction
MIL ON - Not Confirmed - Tested Since Memory Clear
--------------------------------------------------------------------

This can be caused due to low fluid level in the transmission.

Hi Jef,

I currently have the same error code, also caused by low fluid level in the transmission. (B9.5 A5)
What steps do I need to follow so I can clear this code (I have already fixed the fluid level). When I try to delete it (ignition ON), the code re-appears immediately (just beeps, gearbox malfunction on the dash).

Is this info from TSB https://static.nhtsa.gov/odi/tsbs/2021/MC-10202584-0001.pdf relevant:
Select the transmission selector positions in the following sequence:
1. Terminal 15 on and start the engine.
2. Select transmission position N.
3. Stay at least 60 seconds in N so that the accumulator can be filled up.
4. Change briefly to P.
5. Select N again and wait 10 seconds.
6. Turn off the vehicle in P, terminal 15 stays on.
Now the fault memory DTC P17F9 should change from active to passive and can be deleted. It should now be possible to perform the basic setting.

Also what is terminal 15? How do I set it to "ON"?

Regards,
Rodi

 

[SaVAGeSoot]

Also what is terminal 15? How do I set it to "ON"?

Basics of reading VAG wiring diagrams (actually, of the applicable DIN standard).... there's an SSP (Self-Study Program Course Number 873003) out there that you really should read.
Here's a piece of history for you

https://www.motor.com/wp-content/uploads/UnderstandingEuropeanDINWiring-April2003-1.pdf

 

[rodi_abbas]

Basics of reading VAG wiring diagrams (actually, of the applicable DIN standard).... there's an SSP (Self-Study Program Course Number 873003) out there that you really should read.
Here's a piece of history for you

https://www.motor.com/wp-content/uploads/UnderstandingEuropeanDINWiring-April2003-1.pdf

Thanks for the pages!

From what I understand is that terminal 15 should be ON whenever the ignition is ON (start button pressed once without brake)?
I can not seem to see where I can probe it to be sure, since I am a little stressed running the car when there is an active gearbox malfunction.

 

[Uwe]

From what I understand is that terminal 15 should be ON whenever the ignition is ON (start button pressed once without brake)?
I can not seem to see where I can probe it to be sure,

If the instrument cluster is lit up, Terminal 15 is on.

But that doesn't necessarily mean a particular control module sees it as on. Some control modules have a physical wire for terminal 15, and the +12V may not make it to them for any number reasons such as a break in the wire, a blown fuse, or a bum relay. Other control modules in modern cars have a virtual Terminal 15, where they listen for data bus messages that indicate when Terminal 15 is turned on and off.

-Uwe-