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Measure the resistance in ohms for all your cleaned up (and supplemented) grounding points. We’ve been cleaning them for a few years now. Use some dielectric grease to coat the bare metal to prevent rust.
I created a minimal wiring enhancement kit awhile back to reduce the overall resistance of the electrical system. The hot alternator cable is the worst offender by far.
To answer your original question. The ECM uses that sensor to monitor the battery and will adjust the operation of various things based on that data. You may get a DTC after a few drive cycles, so you really should put it back.
If you wish to keep it off, let us know if you get a DTC and see if engine performance increases or decreases as a result.
I created a minimal wiring enhancement kit awhile back to reduce the overall resistance of the electrical system. The hot alternator cable is the worst offender by far.
To answer your original question. The ECM uses that sensor to monitor the battery and will adjust the operation of various things based on that data. You may get a DTC after a few drive cycles, so you really should put it back.
If you wish to keep it off, let us know if you get a DTC and see if engine performance increases or decreases as a result.