how to fault P1604 Polo Megatronics TCM fault code fixed...
The fault code P1640 in a VW Polo indicates an internal control module (ECM) error. This means there's an issue with the car's computer system.
Here are some possible causes of the P1640 code
in a VW Polo:
Faulty ECM
Faulty TCM
Low battery voltage
Incorrect ECM coding (after replacement)
It's recommended to consult a qualified mechanic to diagnose the exact cause and fix the problem.
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