On my 1999 V70XC AWD (136,000 miles) I had the ETM replaced. It ran fine for a couple of days but then the hard idling and going into limp mode came back. I could get it to run ok for two or three times by disconnecting the battery for 30 minutes. After several hours of the dealership mechanic diagnosing (he kept saying Communications Fault), he said the replacement ETM was defective and put on another new one. It ran fine for a week and now the ETS light is occasionally blinking when the car idles after running for a while. Is there something causing these ETMs to go out? Thank you in advance.
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