On the last day of a week of driving tracks at high altitudes my Prado gave me a P0405 fault code. Engine Fault was lit along with Traction Control Off and the 4x4 indicator was flashing. I do not know if the vehicle was speed restricted as I was on tracks but I could not shift from Low Range back to High Range without clearing the code. So my first comment is 'if you cannot read and clear codes, go spend a few bucks and get the gear you need'. I have a Scanguage and checked the code against my printout and P0405 was not on the sheet but it was in the exhaust area so I cleared it and checked if I could engage high range and I could. This code came up five times over two days and each time I needed to change ratios I cleared the code first. I have noted that all faults were at over 1600 metres and now know is is the EGR fault code. In the past week the code has not reappeared so do I have a problem or is the computer confused with high altitude?
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Fault Code P0405
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Fault Code P0405
Prado Polar White 150 GX 3.0 TD Auto. HR TB, ARB delux bar, Hella R2000 lights, Magnum winch, ARB 50mm lift, BFG AT 265/70R17 on 71/2" alloys, Alloy side steps, Rhino sport bars, Tint, UHF, Scangauge, Aux batt (ABR kit), Cargo barrier, 50l water tank, Storage system, Elec brake con. ARB compressorTags: None
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Originally posted by Bear63 View PostAny mod's to the engine management system?Prado Polar White 150 GX 3.0 TD Auto. HR TB, ARB delux bar, Hella R2000 lights, Magnum winch, ARB 50mm lift, BFG AT 265/70R17 on 71/2" alloys, Alloy side steps, Rhino sport bars, Tint, UHF, Scangauge, Aux batt (ABR kit), Cargo barrier, 50l water tank, Storage system, Elec brake con. ARB compressor
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Originally posted by iantz View PostSo did you get the fault again heading out from Talbotville?Prado Polar White 150 GX 3.0 TD Auto. HR TB, ARB delux bar, Hella R2000 lights, Magnum winch, ARB 50mm lift, BFG AT 265/70R17 on 71/2" alloys, Alloy side steps, Rhino sport bars, Tint, UHF, Scangauge, Aux batt (ABR kit), Cargo barrier, 50l water tank, Storage system, Elec brake con. ARB compressor
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I could be wrong because I'm not at work at the moment, but that number rings a bell and the only exhaust type fault I've had on d4d engines is the egr cooler blocking up. The actual Toyota fix for this is to remove the egr cooler and soak in BBQ cleaner. To stop it happening drive the car a bit harder every so often, rev out a bit more and don't let sit idling for ages. Like I said I think that is the number, it does ring a bell but I can't be certain.[LEFT]Silver 150 Facelift
TJM Bullbar, Lightforce Genisis Spots, Dual Battery System with bits from everyone, Powerful 4x4 slider/steps, Kaymar rear bar, "Genuine" Roof Racks, MSA Seatcovers, Dashmat, Tint, LED Interior Globes, Bridgestone D697s [/LEFT]
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It's definitely a low voltage input on the EGR position sensor. I've had it happen to mine once - interestingly enough in the last couple of weeks while driving to work at altitude (it would have been over 1600m) in quite cold temps although nothing that the Prado hasn't done a couple of hundred times before given that I work in a ski resort.
I had no limp mode issues but checked and cleared the code with a Scanguage and haven't had the issue reoccur (yet).
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In a previous car I owned (WRX), you could clear codes (committing them to memory to recall later) by starting & stopping the engine 10 times - I had to do it once to remove limp mode due to a faulty pedal sensor - which was fixed by spraying some contact cleaner into it....
Can anyone confirm this is the case for Prados also?
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