MAP SENSOR CIRCUIT INTERMITTENT LOW VOLTAGE
Manifold Absolute Pressure (MAP) sensor responds to changes
in intake manifold pressure. PCM supplies 5-volt reference and ground
for MAP sensor. MAP sensor provides a signal to the PCM relative to
pressure changes in intake manifold pressure (vacuum). A low voltage
signal, (about 2 volts on VIN K, or 1.5-2.5 volts on VIN 1) is sent to
PCM on signal circuit at closed throttle (high vacuum) idle. A high
voltage signal, about 4 volts or greater on both engines, is sent at
wide open throttle (low vacuum).
You likely won't notice any drivability problems.
- MAP sensor intermittently indicates MAP less than
2.8 psi (0.90 kg/cm).