P0107
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P0107
P0107
Description
MAP SENSOR CIRCUIT 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
Description
MAP SENSOR CIRCUIT 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).
- Hard to start
- Long cranking times
- Sputtering/missing
- Loss of power
- Poor shifting
- Blowing black smoke
- Poor fuel economy
- Dies intermittently
- SES Service Engine Soon light
- Bad MAP sensor
- Disconnected vacuum line
- Open or short in the signal circuit
- Open or short in the 5 Volt reference circuit
- Ground circuit open or shorted
- Test MAP sensor, replace if needed
- Check for vacuum leaks
- Check plug for corrosion or damage
- Test signal circuit wire
- Test 5 Volt reference circuit wire
- Test ground circuit wire
- Ensure harness is not routed too close to high-voltage wires, such as spark plug cables.
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