Manifold Absolute Pressure (MAP) Sensor

An out-of-calibration sensor may not set a trouble code. Use following procedure to check sensor calibration. If driveability problems exist, MAP sensor failure is suspected and no MAP code is present, check MAP sensor vacuum hose for splits, kinks, proper routing and blockage. Check voltage output range of MAP sensor. At idle, voltage should read 1 to 1.5 volts increasing between 4.5 to 4.8 volts at Wide Open Throttle (WOT). MAP sensor circuit malfunction should set a related code in PCM memory. If a MAP sensor-related code is present, see appropriate TESTS W/CODES articles below: