Hi all,
I hopped in my rs6 a couple weeks back and it cranks no problem, but won't start. I noticed that PRNDS were all lit up solid, no blinking. After some time and fiddling, PRNDS went away and she fired right up. On the way home about 15 minutes later under light acceleration it felt like the trans popped in to neutral and again PRNDS. More fiddling/time and again it went away and I drove uneventfully for about 2 weeks.
Then 2 days ago while driving at a steady 30 MPH again it feels like it pops in to neutral and PRNDS. Managed to get PRNDS to go away and made it home, grabbed vagcom and it just shut off on its own and hasn't started since - PRNDS and radiator fans running full speed. Have not noticed any slippage at any point in the tranny, always pulled strong to date. Clicking over 106,000 miles, had it since 60k and maintained well.
I have reseated the ECM/relays under the hood, checked all the fuses and am going to reseat the TCM today and check for moisture. This time, no luck getting PRNDS to go way. Oddly the radiator fans turn on after maybe 15-20 seconds once the key is turned and run continuously. I have read about the sensor under the shifter and will be looking at that as well, but the fans running makes me think its not as simple as that. Loose wire somewhere??
The missing ECU errors are concerning, but not totally sure if that could mean the one under the hood on drivers side, or the transmission one under the passenger seat.
Would be grateful for some guidance where I should focus my attention first.
Vagcom showing:
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Address 02: Auto Trans Labels: 01L-927-156.lbl
Part No: 4B0 927 156 FL
Component: AG5 01L 4.2l5VT USA 0305
Coding: 0000002
Shop #: WSC 00000 785 00200
VCID: 76E99E52022A2D91457-513C
1 Fault Found:
18258 - Powertrain Data Bus
P1850 - 003 - Missing Message from ECU
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Address 03: ABS Brakes Labels: 4B0-614-517.lbl
Part No: 4B0 614 517 AD
Component: ESP 5.7 RS 6 2310
Coding: 06697
Shop #: WSC 00000
VCID: 63CFD706F1B8A839129-513C
2 Faults Found:
18258 - Powertrain Data Bus
P1850 - 35-00 - Missing Message from ECU
18258 - Powertrain Data Bus
P1850 - 35-00 - Missing Message from ECU
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Address 08: Auto HVAC Labels: None
Part No: 4B0 820 043 AM
Component: 4B0820043AM A6-Klimavoll
VCID: 74EDA45A44563F817B3-2580
3 Faults Found:
01274 - Air Flow Flap Positioning Motor (V71)
41-10 - Blocked or No Voltage - Intermittent
01314 - Engine Control Module
49-00 - No Communications
01206 - Signal for Duration of Ignition Off Time
27-00 - Implausible Signal
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Address 56: Radio Labels: 8E0-035-192-RNSE.lbl
Part No SW: 4B0 035 192 P HW: 4B0 035 192 P
Component: RNS-E US3 H49 X---
Revision: 05S Serial number: AUZBZ7E1116664
Coding: 0509613
Shop #: WSC 32093 133 55480
VCID: 2A517A228612397111F-5178
4 Faults Found:
00858 - Connection; Radio Intermediate Frequency (IF) Output to Antenna Amplifier
011 - Open Circuit
Freeze Frame:
Fault Status: 01101011
Fault Priority: 5
Fault Frequency: 3
Reset counter: 103
Time Indication: 0
Date: 2015.01.08
Time: 09:18:41
Freeze Frame:
Mileage: 655350 km
Count: 801
Clock: 09:23
00852 - Loudspeaker(s); Front
011 - Open Circuit
Freeze Frame:
Fault Status: 01101011
Fault Priority: 5
Fault Frequency: 1
Reset counter: 63
Time Indication: 0
Date: 2015.01.08
Time: 09:18:17
00857 - CD Changer Unit (R41)
004 - No Signal/Communication
Freeze Frame:
Fault Status: 01100100
Fault Priority: 5
Fault Frequency: 1
Reset counter: 63
Time Indication: 0
Date: 2015.01.08
Time: 09:19:07
02005 - Coding Pin
004 - No Signal/Communication
Freeze Frame:
Fault Status: 01100100
Fault Priority: 5
Fault Frequency: 1
Reset counter: 63
Time Indication: 0
Date: 2015.01.08
Time: 09:18:27
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I appreciate any and all help!
Bren