Q: How to Replace a MAP Sensor?A: When replacing the Manifold Absolute Pressure(MAP) sensor, disconnect the cable from the negative battery terminal, remove the Idle Air Control (IAC) solenoid valve from the throttle body, and disconnect the electrical connector from the MAP sensor. Next, unscrew the MAP sensor from the throttle body, depress the release tab and disconnect the electrical connector from the MAP sensor, remove the MAP sensor mounting screws, remove and discard the old MAP sensor O-ring, install a new gasket when installing the IAC valve, install a new O-ring when installing the sensor. Installation is the reverse of removal.