Hello there, looks like there is a battery current sensor on the negative battery post. This sensor transmits battery voltage, current flow, and battery temperature on a Lin Bus network to the engine computer which is what controls the charging circuits. The battery sensor cannot be over tightened, or the circuit board inside can crack. The system needs to be checked using a scan tool capable of reading the live data and see if there are any issues with the battery sensor. The torque spec for the negative battery post is only 2-4.4 lb ft. It is not much. Charging systems have changed dramatically on modern vehicles. The live data for the engine computer (ECM) needs to be checked, also scanned for any possible diagnostic trouble codes. You probably want to bring it back to whoever did the work. Just having the Alternator voltage checked is not enough.
Sunday, May 28th, 2023 AT 5:17 PM