P1107
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P1107
P1107
Description
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).
Symptoms
You likely won't notice any drivability problems.
Causes
Description
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.
Causes
- MAP sensor intermittently indicates MAP less than
2.8 psi (0.90 kg/cm).
- If DTC P0107 is also set, diagnose DTC P0107 before
proceeding. - Check for intermittent open or faulty splice in 5-volt
reference circuit. - Locate and repair intermittent open/short circuit.
- Check for faulty connections or damaged harness.