: Inspect the small connector going to the negative battery terminal. Ensure it is firmly seated and the wires are not damaged.

: A failing battery that cannot maintain proper voltage may lead the sensor to report "out of range" values. Diagnostic and Repair Steps

While the most immediate sign is a warning light, you may also experience:

: On newer models, this system may be disabled because the ECM cannot accurately verify the battery's state of charge. Potential Causes

: Frayed, broken, or shorted wires in the sensor's harness.