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VAG Engine & Transmission Codes

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73K views 29 replies 10 participants last post by  Crasher  
Which part number Bosch sensor did you fit after the cat?
 
That is a VAG number, so it was genuine and your car is DSG. Further than that I would need to look at the wiring diagram at work tomorrow, bank holiday today.
 
I need to check at work but yes the heater is ignition live power, ECU earth switched and if the sensor is genuine and definitely not faulty, this is going to be either wiring from the ECU or the ECU itself which does very occasionally happen due to water damage as VW put it in a daft place. I diagnosed one on a 2008 Golf 5 yesterday and it is only the second in about two years.
 
No relay, ECU direct drive.