UK Car Repair Questions? Ask a Mechanic for Answers ASAP
Hello and thanks for trusting me to help you today. I am a licensed diagnostic and repair technician, I look forward to working with you.
Apologies for the delay in answering your question, Hopefully I can help.The DAC (Digital Analog Convertor) Is part of the integrated circuit within the Engine ECU. This is often caused by a software problem within the ECU, however can also be caused by an internal component failure.The first step if not done already is to carry out a full ECU Re-set, Some diagnostic systems can do this, others can't if there is no option to perform a re-set on your system, Disconnect the battery for 10 mins and attempt to start.Assuming that has already been tried and has not worked, Unfortunately I think either the ECU Has a physical fault or the software is corrupt. Unfortunately either way the only cure is to send the ECU For testing and repair. Or Opt for a replacement ECU. I have come across instances where wires have gone to ground during a repair and caused this but, the most common cause is a voltage spike caused by jump starting, these ECU's seem to be very sensitive to this problem.