Good Day
Could you please tell me what does code P1603 Ctrl. module faulty mean
Hi there,
This means you have a faulty ECM or possibly a wiring issue to the ECM. Here is some more info for you.
P1603 VOLKSWAGEN - Engine Control Module Defective Read more: https://www.autocodes.com/p1603_volkswagen.html
36.2k questions
32.2k answers
1.3k comments
22.8k users