Pcm Code E71, Intermittent Map Sensor: Description
WARNING: This page is about a different car, the 1992 Cadillac Fleetwood and 1992 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
This test monitors TPS, RPM, MAP, EGR flow and A/C clutch. If TPS, RPM, EGR flow and A/C clutch remains constant, but MAP sensor changes rapidly, code will set. Engine operation requires a large change in manifold pressure must be preceded by a change in throttle angle.