2006 Buick LuCerne
In March I took the car in for a radiator flush, new hoses and thermostat. Since then it's been back 7 times for a recurring SES light with the P0128 error code. The last time they said it was a now a pcm module problem. A friend and myself installed this module. Again after a month the SES light came on.
Do you have any suggestions or idea what might be causing this error. It was not there before the routine maintenance work. Thanks