Code P071, Intermittent Map Sensor: Notes
WARNING: This page is about a different car, the 1995 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
This test monitors TP sensor, RPM, MAP, EGR flow and A/C clutch status. Engine operation requires a large change in manifold pressure must be preceded by a change in engine load due to changes in throttle angle. If MAP changes rapidly and all other parameters remain constant, Code P071 will set.