Having problems with your Volkswagen Passat ?

I replaced the heater core , now i have no communication,no power to ecu fuse 29 dtc p1850 battrey was disconnected

Posted / edited by AnonymousUser on : 18-03-2019

Answers :

If you disconnected your battery for the heater core replacement, the computer is simply telling on you. You are SUPPOSED to disconnect it, but the computer is just a doggone tattle-tell. Simply clear the code and move on with your life. (If you are getting codes from the ECU, you obviously don't have a communication problem with the ECU)
Repair Help & Product Troubleshooting for Volkswagen Passat

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