SpikeUK
Member Since: 21 Sep 2015
Location: Bodmin
Posts: 27
  
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I was driving my D3 this evening when it went into what I can only describe as "idle only mode". While in Drive, the engine refused to go any faster than idle speed, so I couldn't get the car to go any faster than walking speed, even with the accelerator on the carpet. Normal limp mode limits the car to 40 mph, so it wasn't that.
I checked it with my Gap 11 tool, there were a few new codes I haven't seen before:
B1B70-81 (28) Local interconnection network bus circuit 2 - Bus signal/message failure - invalid serial data
P0234-00 (28) Turbo/supercharger overboost condition
Suspension
C1A30-64 (68) Both switches pressed at the same time - Algorithm based failure - signal plausibility failure
I don't quite know how the turbo can overboost, but could it put the car into idle only mode?
I stopped the engine briefly, and that reset the fault and I was able to drive home normally.
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 23rd Jan 2023 1:47 am |
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SpikeUK
Member Since: 21 Sep 2015
Location: Bodmin
Posts: 27
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As a follow-up, does anyone know what the maximum boost pressure should allowed to go up to before the ECU trips something? I had the Gap tool showing live boost pressure today, and put my foot down going up a hill, to try and provoke something. When the boost pressure got close to 45 psi, the engine immediately cut to "idle mode". This time the power reset itself after a few moments without having to stop the engine.
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| 23rd Jan 2023 8:45 pm |
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Sidestick
Member Since: 22 Apr 2012
Location: Rome
Posts: 2288
 
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It sounds like a "MAP sensor" issue... check it, could be clogged  - Easy-Lift suspension module 4.0
- GoodWinch 9500 lb
- Full underbody protections
- Tree/Rock sidebars
- Prospeed roofrack & ladder
- Compressor guard
- Raised Air Intake
- Driving lights (2+4)
- 50 mm Waffle boards
- Altox Heater control
- Overland Rooftop Tent
- Rear seats entertainment
- Front & Rear camera
- GVIF
- Removable tow bar
- Cubby box fridge
- BFG KO2 265/65R17
- iidTool BT
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| 23rd Jan 2023 10:25 pm |
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