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P0605 Diagnostic Trouble Code Discussion for July 2006

Internal TCM Malfunction

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Trouble Ticket Help Requests for DTC P0605
Help Request Posted
1996 Volkswagen Passat TDI 1.9L Excessive Emissions, Poor Fuel Economy VIN: WVWHG83A5T
P0605: Internal Control Module ROM test error. ... tdi in my shop. Customer complained of more than normal black smoke when car is driven hard. Does not smoke when driven gently. He says fuel economy has gone down too. Does about 30 mpg now. Check Engine light is always on. If i clear the code while engine...
July 12, 2006