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Home >> Chevrolet >> 1987 >> Astro Van M L4-151 2.5L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Scan Tool Testing and Procedures >> Positions >> BARO - Barometric Pressure
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BARO - Barometric Pressure


Barometric pressure is displayed as a voltage value of 2.5-5.5 volts, depending upon altitude and barometric pressure. BARO reading should be equal to MAP reading before engine is started.