Help needed with continued errors

[jagonz]

Well everyone I’m here to see if the forum could help me out with my 2005 LR3 4.4l V8.

First are the dashboard warnings.

Second are the trouble codes read with the GAP IID Tool.

Third are all of the replacements I have completed within the last 4 weeks.

Fourth is what I have taken apart and cleaned.

Any help would be greatly appreciated and thanks for your time to read.

Dashboard Warnings:
Special Programs Off
Transmission Fault Limited Gears Available
Parking Brake Error

Trouble codes from the GAP IID tool:
Airbag

• B0001-1B (AF) Driver's frontal stage 1 - deployment control - General electrical failure - circuit resistance above threshold
  ( on 16-04-2025 16:17:48 at 180370 mi )
• B0002-1B (AF) Driver's frontal stage 2 - deployment control - General electrical failure - circuit resistance above threshold

Engine Petrol

• P0102-00 (36) Mass or volume air flow circuit low input

Instrument Pack

• U0164-87 (27) Lost communication with heating ventilation and air conditioning control module - Bus signal/message failure - missing a message
• B1A00-46 (50) Control module - System internal failure - calibration/parameter memory failure
  - Test Not Completed
  - Test Not Completed This Monitoring Cycle
• B1A75-92 (50) Fuel sender 1 circuit - Component failure - performance or incorrect operation
  - Test Not Completed
  - Test Not Completed This Monitoring Cycle
• B1A76-92 (50) Fuel sender 2 circuit - Component failure - performance or incorrect operation
  - Test Not Completed
  - Test Not Completed This Monitoring Cycle
• B1A78-64 (50) Front fog lamp circuit - Algorithm based failure - signal plausibility failure
  - Test Not Completed
  - Test Not Completed This Monitoring Cycle
• B1A79-64 (50) Rear fog lamp circuit - Algorithm based failure - signal plausibility failure
  - Test Not Completed
  - Test Not Completed This Monitoring Cycle
• B1A80-64 (50) Oil pressure circuit - Algorithm based failure - signal plausibility failure
  - Test Not Completed
  - Test Not Completed This Monitoring Cycle
• B1A81-64 (50) Internal trip switch circuit - Algorithm based failure - signal plausibility failure
  - Test Not Completed
  - Test Not Completed This Monitoring Cycle
• B1A82-64 (50) External trip switch circuit - Algorithm based failure - signal plausibility failure
  - Test Not Completed
  - Test Not Completed This Monitoring Cycle
• B1A84-46 (50) Vehicle configuration data - System internal failure - calibration/parameter memory failure
  - Test Not Completed
  - Test Not Completed This Monitoring Cycle
• B1A86-64 (50) Ignition status - Algorithm based failure - signal plausibility failure
  - Test Not Completed
  - Test Not Completed This Monitoring Cycle
• B1A87-68 (50) Battery disconnection/electronic control unit reset - Algorithm based failure - event information
  - Test Not Completed
  - Test Not Completed This Monitoring Cycle
• B1A00-17 (50) Control module - General electrical failure - circuit voltage above threshold
  - Test Not Completed
  - Test Not Completed This Monitoring Cycle
• B1A00-16 (50) Control module - General electrical failure - circuit voltage below threshold
  - Test Not Completed
  - Test Not Completed This Monitoring Cycle
• B1A88-49 (50) System timer - System internal failure - internal electronic failure
  - Test Not Completed
  - Test Not Completed This Monitoring Cycle
• B1A00-4B (50) Control module - System internal failure - over temperature
  - Test Not Completed
  - Test Not Completed This Monitoring Cycle
• B1A00-48 (50) Control module - System internal failure - supervision software failure
  - Test Not Completed
  - Test Not Completed This Monitoring Cycle

Steering Angle

• U1A14-49 (50) CAN initialisation failure - System internal failure - internal electronic failure
  - Test Not Completed
  - Test Not Completed This Monitoring Cycle
• C0051-64 (50) Steering wheel position sensor - Algorithm based failure - signal plausibility failure
  - Test Not Completed
  - Test Not Completed This Monitoring Cycle
• U3002-62 (50) Vehicle identification number - Algorithm based failure - signal compare failure
  - Test Not Completed
  - Test Not Completed This Monitoring Cycle

Terrain Response

• U0402-94 (27) Invalid data received from transmission control module - Component failure - unexpected operation
  ( on 16-04-2025 17:26:56 at 180370 mi )
  - Test Failed
  - Test Failed This Monitoring Cycle
  - Pending
  - Test Failed Since Last Clear
• U0416-94 (27) Invalid data received from vehicle dynamics control module - Component failure - unexpected operation
  ( on 16-04-2025 17:26:56 at 180370 mi )
  - Test Failed
  - Test Failed This Monitoring Cycle
  - Pending
  - Test Failed Since Last Clear
• U0421-94 (27) Invalid data received from ride level control module - Component failure - unexpected operation
  ( on 16-04-2025 17:27:03 at 180370 mi )
  - Test Failed
  - Test Failed This Monitoring Cycle
  - Pending
  - Test Failed Since Last Clear
• U1A14-49 (50) CAN initialisation failure - System internal failure - internal electronic failure
  - Test Not Completed
  - Test Not Completed This Monitoring Cycle
• C1A02-94 (50) Rotary encoder stuck in the intermediate position - Component failure - unexpected operation
  - Test Not Completed
  - Test Not Completed This Monitoring Cycle
• C1A01-96 (50) LED circuit - Component failure - internal failure
  - Test Not Completed
  - Test Not Completed This Monitoring Cycle

Transfer Case

• P0903-00 (50) Clutch actuator - circuit high
  - Test Not Completed
  - Test Not Completed This Monitoring Cycle
• P0902-00 (50) Clutch actuator - circuit low
  - Test Not Completed
  - Test Not Completed This Monitoring Cycle
• P0900-00 (50) Clutch actuator - circuit/open
  - Test Not Completed
  - Test Not Completed This Monitoring Cycle
• P173F-00 (50) Ignition key lock solenoid - circuit high
  - Test Not Completed
  - Test Not Completed This Monitoring Cycle

Transmission

• U2023-86 (27) Control module network signal calibration data - Bus signal/message failure - signal is invalid

Replacements:

Brake light switch, FOMOCO, Jaguar
Alternator, Denso
Battery, Diehard
All taillight bulbs replaced, RoverParts.com
Transmission Fluid changed, ZF
Solenoids replaced, ZF
Transfer Case Fluid changed
Front and Rear Differential Fluid changed

Transfer Case Control Module, cleaned connector and it was corroded with green oxidation.

 

[Canada_Dry_Garage]

I don't know a lot about all the warning codes and stuff but boy do know about "Transmission Fault Limited Gears Available" My 2008 LR3 had that for some time and it would struggle up hills. We tried flushing the transmission but it didn't really do anything. A few weeks later it wouldn't go into gear and we had to put it in storage. I plan on rebuilding the transmission sometime, but I wouldn't drive your land rover until fixed. I would think about rebuilding the trans or replacing it. It also could be something really simple too.

 

[Rover Range]

99% of those DTCs are "ghost DTCs."
Clear all the DTCs and drive the vehicle until you issue comes up. Then retest.

 

[FRCI]

I agree most of those probably aren't legit. I've had similar experience when the CAN bus was having issues. It started from a sunroof water leak submerging some grounding lugs, then leading to a failed soldier joint on the chip on the back of the IPC. Due to the timing of the problem, I'd guess the ground lug issues may have exacerbated the soldier joint failing on the IPC (CAN bus ground was temporarily the whole ground for the IPC? which it wasn't designed to do).

Two issues come to mind,
1. Review the grounding lugs in the passenger foot well (lowest right corner where passenger right foot might be sitting). Those connect to the IPC (and thus the CAN bus eventually). Make sure they're dry and tight. In my case, a stopped up sunroof drain led to them being submerged and having intermittent connectivity. There was visible rust and scoring around them once I removed them and inspected them.

2. If you can stand to do it, I pressed gently on the lower right corner of the CPU chip on the back of the IPC and then started the vehicle. In my case, the pins were broken free from the board and this gentle press was just enough to reconnect them. Just like that, the CAN bus warnings went away. Of course, if I stop holding pressure on the chip, the issue returns but this confirmed the bad soldier join.

In my case, reflowing the pins was required to permanently fix the issue. Or one could replace the IPC altogether with the appropriate tools (I use the SDD and NanoVCX myself but others work as well).

 

[FRCI]

Some images that might be helpful.