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Post by Monkey on Apr 16, 2015 13:51:48 GMT 1
The fault Codes are
P006A-00 MAP - Mass or volume air flow correlation
P0108-00 MAP/Baro - sensor high input
Intermittantly loses power, ign on and off and fault remains. Codes cleared and same return after fault.
I've smoke tested it, it's already had a MAP sensor and I've checked the Elec throttle flap for problems. Baro and map data match on key on.
An annoying intermittant problem I can't catch the clue.. 5v refs/earths all good at MAP and throttle flap.
Intake leaks (between MAF and turbo) all ok.
Crystal ball?
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Post by Noberator on Apr 16, 2015 18:39:39 GMT 1
The fault Codes are P006A-00 MAP - Mass or volume air flow correlation P0108-00 MAP/Baro - sensor high input Intermittantly loses power, ign on and off and fault remains. Codes cleared and same return after fault. I've smoke tested it, it's already had a MAP sensor and I've checked the Elec throttle flap for problems. Baro and map data match on key on. An annoying intermittant problem I can't catch the clue.. 5v refs/earths all good at MAP and throttle flap. Intake leaks (between MAF and turbo) all ok. Crystal ball? Monkey would you say the Freelander is tripping the car into restricted performance mode. Sometimes to much boost other times to little.
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Post by Monkey on Apr 16, 2015 18:46:44 GMT 1
I don't think it's an over boost issue, it can happen on mild acceleration rather than flat out.
Goes like a missile. No performance issues.
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Post by Noberator on Apr 16, 2015 19:00:21 GMT 1
I don't think it's an over boost issue, it can happen on mild acceleration rather than flat out. Goes like a missile. No performance issues. Is the MAP sensor that was replaced a genuine Land Rover part? Harness to the MAP sensor all intact or a short in the harness itself?
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Post by Monkey on Apr 16, 2015 19:33:17 GMT 1
No it's an aftermarket part but the fault remains, and it checks out. And not with a power probe I've checked harness for insulation.
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Post by Noberator on Apr 16, 2015 22:39:10 GMT 1
No it's an aftermarket part but the fault remains, and it checks out. And not with a power probe I've checked harness for insulation. Intake Manifold vacuum leak? EGR Valve sticking? Have you given the harness a wiggle to see if it makes any difference.
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Post by valhalla on Apr 16, 2015 23:04:29 GMT 1
Monkey, what year are we talking about here? 2007 or a more recent one? Are these the only two faults that are coming up? If so, check the base of the air cleaner box and the dirty-air ducting into the base; they often fall apart, resulting in collapse of trunking, blockage of the base of the airbox, which will throw your baro readings out. The fix is to re-make the the air-path through to the engine.
Live data, correlate the baro sensor versus MAP before and after starting, that will tell you if you have a dodgy sensor, or a collapsed air duct.
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Post by Monkey on Apr 16, 2015 23:09:24 GMT 1
It's 2010
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Post by valhalla on Apr 16, 2015 23:13:44 GMT 1
Right, that'll be a tight diagnostic window on the signals from MAP and baro, to protect the DPF airflow modelling. You might have to go and source a genuine LR_parts MAP if you cannot track-down the discrepancy.
I'll put my mind into overdrive...
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Post by Noberator on Apr 17, 2015 0:16:58 GMT 1
Right, that'll be a tight diagnostic window on the signals from MAP and baro, to protect the DPF airflow modelling. You might have to go and source a genuine LR_parts MAP if you cannot track-down the discrepancy. I feel a song coming on.
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Post by Trevor on Apr 17, 2015 0:28:10 GMT 1
How often do the fault occur?
Have u actual vs recommended boost pressure readings in the live data section on your computer? if so do they match?
Can u graph the throttle sensor vs the map sensor vs the egr valve readings under light load and tell us whats happening with them? those results should help us,
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Deleted
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Post by Deleted on Apr 17, 2015 13:17:13 GMT 1
Just run a new ground for the map
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Post by valhalla on Apr 17, 2015 15:21:55 GMT 1
Just run a new ground for the map Isn't that the Defender Puma2.4 for the MAP harness overlay job? Don't know I've heard much about the DW12 having the same issue, but their both Ford-sourced engines (OK, the latter is a Pug by design...) and I guess that might make each other share some comon faults.
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Post by Deleted on Apr 17, 2015 18:59:51 GMT 1
Just run a new ground for the map Isn't that the Defender Puma2.4 for the MAP harness overlay job? Don't know I've heard much about the DW12 having the same issue, but their both Ford-sourced engines (OK, the latter is a Pug by design...) and I guess that might make each other share some comon faults. its all speculation val on the forum ! its just one of my mad suggestions, Monkey knows what im'e like
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Post by valhalla on Apr 17, 2015 19:45:29 GMT 1
The annoying thing is...I've heard of this before. It does sound like something stupid like a shared sensor earth, which can only be fixed by either a) finding the sensor that's pulling the ground all over the place, or b) running a new earth, like you say! These Bosch EDC strategies are appalling, and the DW12 is not immune to silly issues with harnesses not being perfect.
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