LR4: Long Crank, Multiple Faults, No Dash Lights Illuminated

CAgrownCOgirl

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Hoping one of you can help me figure this out!!

Took Betty White (2011 LR4 HSE 120k miles) into our normal mechanic to diagnose an intermittent long crank upon push button start up. No dash lights illuminating at any time, no other issues, performance is normal.

Faults found:
B1087-88 Lin Bus A (bus is off)
B1088-88 Lin Bus B (bus is off)
B12C9-88 Local Interconnection Network Bus "e" (bus is off)
B1C44-67 Rear Wiper Park Position Switch (signal is incorrect after the event)
B11FF-84 AC Refrigerant Pressure (signal is below allowable range)
U0128-00 Lost Communication with Parking Brake CM (no sub type info)
P0850-8F Park/Neutral Switch Input Circuit (erratic)
P003C-00 Intake (A) Camshaft Profile Control Performance or Stuck Off - Bank 1 (no sub type info)

12 Modules also not responding – I can list them if that would be helpful.

Mechanic thinks the neutral safety switch may need to be replaced (to the tune of around $5k!) but he couldn’t replicate the long crank on push button start up or find any other work that Betty needed other than the mileage service.

Thoughts?!
 

djkaosone

'11 LR4 HSE LUX 5.0L V8
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If you still have access to your truck, does it atart in (N)eutral?

PS, you can take it out of (P) and into (N)eutral by taking out the center cup holder and pushing in the white plastic and shifting it to N.
 

CAgrownCOgirl

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We do, she's home with us! We will try this and let you know the result.

I know if it only starts in N that means the neutral saftey switch likely is shot, but what would it mean if it starts in both P and N?
 

djkaosone

'11 LR4 HSE LUX 5.0L V8
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If it starts faster in N, then it could be your neutral safety switch. If it takes the same number of "long" cranks to start in P or N, then it's something else. If you can clear the codes and see what comes back, that'll give you a clearer picture of what's going on.

If I were to take a guess, liquid may have found its way into the shifter assembly and possibly the ebrake switch.
 

Izzyandsue

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Have you checked the battery? A low battery charge, even a couple of volts, creates all kinds off odd behavior on these trucks. If you have another vehicle, can you add jumper cables to the LR4 and see if its related to that?
 

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