Vw amarok came in with a complaint of lack of power, going into limp mode, and a glow plug warning light on the dash. The fault codes were scanned with VCDS, multiple codes were stored in the engine ECU. They all pointed towards sensors with 5 volt references, and even a fault for the voltage reference B - the 5v reference all the sensors used. Checking through the wiring diagrams confirmed this. However, the vehicle wasn't now in limp mode and was performing fine. All the sensors logging codes were checked for their respective 5v reference and all was good. I then removed the top of the EGR valve and found water ingress and heavy corrosion on all the electrical contacts. This was found to be the cause of the 5v reference problem, and in would have been shorting it to ground through the water/corrosion on the contacts.
Негізгі бет VW Amarok 2.0 TDI In Limp Mode P0651 P0236 P1440 P0322
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