Pcm Code P071 - Intermittent Map Sensor Signal: Notes
WARNING: This page is about a different car, the 1993 Cadillac Seville and 1993 Cadillac Eldorado. 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. If MAP changes rapidly and all other parameters remain constant, PCM Code P071 will set. Engine operation requires a large change in manifold pressure must be preceded by a change in throttle angle.