SUBARU

A: The sensor informs the car of the exact battery status, measures the temperature and controls the charging voltage and charging current accordingly.

A: When a battery current sensor goes bad, you may experience symptoms like inaccurate battery readings, inconsistent charging, a malfunctioning stop-start feature, dashboard warning lights, dim lights, and difficulty starting the engine. The sensor's failure can also lead to premature battery wear, decreased vehicle power, and potential damage from improper charging.

A: The cost of replacing a TPMS sensor battery varies depending on the make and model of your vehicle, but generally speaking you should expect to pay anywhere from $20-$200 for each replacement battery, plus labor costs if you have it done at an auto repair shop or dealership.

A: When a battery current sensor is faulty, its output signal may become unstable. Current readings may jump, fluctuate, or be discontinuous and not conform to the expected pattern of variation.

A: Depending on usage and environmental factors, these batteries are designed to last for several years, usually between 5 to 10 years.

A: Use a multimeter to measure voltage and current flow through the sensor. If readings are inconsistent or the sensor shows physical damage, replacement is recommended. Regularly clean terminals and ensure tight connections to maintain accurate battery monitoring and prevent charging system errors.