65945 Mercury COVER, EXHAUST MANIFOLD

Table 1
Diagnostic Trouble Codes for the Engine Pressure Sensors    
CDL Code    Description    Notes    
100-3     Engine Oil Pressure Sensor : Voltage Above Normal     The Electronic Control Module (ECM) detects the following conditions:
The signal voltage from the engine oil pressure sensor is greater than 4.8 VDC for more than 8 seconds.
If equipped, the warning lamp will come on. The ECM will log the diagnostic code. The ECM will set data for engine oil pressure to the default value. The default engine oil pressure is
600 kPa (87 psi). The electronic service tool will display "Voltage Above Normal" on the status screens.    
100-4     Engine Oil Pressure Sensor : Voltage Below Normal     The ECM detects the following conditions:
The signal voltage from the engine oil pressure sensor is less than 0.2 VDC for more than 8 seconds.
The ECM has been powered for at least 2 seconds.
The engine is running or the barometric pressure is greater than
55 kPa (8 psi).
If equipped, the warning lamp will come on. The ECM will log the diagnostic code. The ECM will set data for the engine oil pressure to the default value. The default engine oil pressure is
600 kPa (87 psi). The electronic service tool will display "Voltage Below Normal" on the status screens.    
274-3     Atmospheric Pressure Sensor : Voltage Above Normal     The ECM detects the following conditions:
The signal voltage for the barometric pressure sensor is greater than 4.8 VDC for at least 8 seconds.
If equipped, the warning lamp will come on. The ECM will log the diagnostic code.    
274-4     Atmospheric Pressure Sensor : Voltage Below Normal     The ECM detects the following conditions:
The signal voltage for the barometric pressure sensor is less than 0.2 VDC for at least 8 seconds.
If equipped, the warning lamp will come on. The ECM will log the diagnostic code.    
1785-3     Intake Manifold Pressure Sensor : Voltage Above Normal     The ECM detects the following conditions:
The signal voltage from the intake manifold pressure sensor is above 4.8 VDC for at least 2 seconds.
The ECM has been powered for 2 seconds.
If equipped, the