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  #1  
Old 23rd May 2024, 06:51 PM
quattronutter quattronutter is offline
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Default Egt faults 4.2 tdi

Egt bank 2 sensor 1 short to ground fault,new sensor not resolved,bypassed loom from new sensor to ecu,now egt sensor 3 also shows a fault,do they share a common earth?
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Old 24th May 2024, 07:57 AM
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steamship steamship is offline
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Check out the wiring diagram PDF in the D4 Technical Info & Upgrades Sticky thread, because although the title suggests it's only the 4.2 petrol engine, it also covers the 4.2tdi. I did a search on 'exhaust gas' and the first result was for 'Exhaust gas temperature sender 4'. Here's a link to the PDF:

https://forum.a8parts.co.uk/attachme...6&d=1430166742
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Old 24th May 2024, 08:08 AM
quattronutter quattronutter is offline
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Cheers yes have the wiring diagram,egt 1 bank g236,i have traced wiring from sensor to the ecu,also bypassed original wiring although when i do this egt 3 also flags faults...
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Old 26th May 2024, 03:46 PM
quattronutter quattronutter is offline
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2 new sensors and section of loom still not resolved,looks like il have to delete egt 1 from ecu..
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Old 26th May 2024, 07:46 PM
ainarssems ainarssems is offline
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Quote:
Originally Posted by quattronutter View Post
2 new sensors and section of loom still not resolved,looks like il have to delete egt 1 from ecu..
Open up ECU, check for dry solder joints??? Or check for shorted MOSFETs or other drivers inside ECU.
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Last edited by ainarssems; 26th May 2024 at 07:48 PM.
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Old 26th May 2024, 08:17 PM
quattronutter quattronutter is offline
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Cheers,yes might be worth warming the board in case of dry joint
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