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
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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