My 05 Mazda 6 with 4cyinder is driving me crazy. It will go into limp in mode and the charge light comes on when accelerating. I have seen lots of complaints on other forums but no one seems to have an answer I’m a retired mechanic of 45 years so I do know my way around a car. It will sometimes indicate a code but I have yet to catch it. It will return to normal when I came to a stop and will be fine for a while. I have checked and cleaned all the grounds as I was told that was the fix. Nope still does it I have talked to several transmission shop owners that I know and they all say the same thing. Change solenoids, fluid and complete transmissions and got bit on the *** when the car was doing the same thing as before the repairs. All of them ended up changing the trans ECM and all but one said it took care of the problem. That one guy that still has the problem leads me to think it’s more than just the ECM. Any thoughts?

I have driven the car with a volt meter connected at the battery. When it goes into limp in and the charge light comes on the voltage is 131/2 to 14 volts. The check engine light comes in sometimes when this occurs. I check for codes and nothing. I was beginning to think I had a freak problem but I have read about this same complaint on other forums. I have yet to read a response or answer.