Check Engine light came on - Codes P0642 and 2004 - what do these mean and what are possible solutions?
Volkswagen Q&AAsk Your Question
2007 Volkswagen Passat Question: What are codes P06742 and 2004
Answer #1csubak30 May 21, 2013, 21:40Master
This is for an ECM short or poor electrical connection. The ECM may need replaced or there is a shorted sensor on 5 volt circuit. The 2004 code is for an intake manifold runner control bank 1 stuck open. This could be the cause of the ECM fault code. Check the manifold runner for a possible short.