79735A 1 Mercury COVER, STARTER MOTOR TO CRANKCASE (TOP)

Table 1
Code Description Conditions Present Response
110-3 Coolant Temp Sensor Voltage Above Normal Battery voltage is normal.
Voltage of coolant temperature sensor is 4.870 V or above for 3 seconds or more. Duringstart-up the system will default to −25° C (−13° F) and under other conditions it will be 80° C (176° F).
Engine derates 25%
EGR stops
Intake throttle fully open.
Warning Level 2
White smoke increases at low temperature
110-4 Coolant Temp Sensor Voltage Below Normal Battery voltage is normal.
Voltage of coolant temperature sensor is 0.176 V or less for 3 seconds or more.
171-3 Intake Air Temp Sensor (in MAF) Voltage Above Normal Battery voltage is normal.
Intake air temperature built-in MAF sensor voltage is 4.850 V or more for 3 seconds or more. The system will use a default of 25° C (77° F).
Warning Level 2
171-4 Intake Air Temp Sensor (in MAF) Voltage Below Normal Battery voltage is normal.
Intake air temperature built-in MAF sensor voltage is 0.2 V or less for 3 seconds or more.
172-3 Intake Air Temp Sensor Voltage Above Normal (in Boost Pressure Sensor, Turbocharged versions only) Battery voltage is normal.
Voltage of intake air temperature sensor is 4.95 V or above for 3 seconds or more. The system will use a default of 40° C (104° F).
Warning Level 2
White smoke increases at low temperature.
172-4 Intake Air Temp Sensor Voltage Below Normal (in Boost Pressure Sensor, Turbocharged versions only) Battery voltage is normal.
Voltage of intake air temperature sensor is 0.2 V or less for 3 seconds or more.
3242-3 DPF Inlet Temperature Sensor Voltage Above Normal Battery voltage is normal.
Coolant temperature is 50° C (122° F) or more continues longer than 10 minutes after engine starting.
T0 is between 100° C (212° F) and 800° C (1472° F) continues longer than 10 seconds or T2 is between 100° C (212° F) and 800° C (1472° F) continues longer than 10 seconds.
DPF inlet temperature sensor (T1) voltage is 4.92 V or more for 2 minutes or more. The system will use a default of 0° C (32° F).
Engine derates 25%
Warning Level 2
3242-4 DPF Inlet Temperature Sensor Voltage Below Normal Battery voltage is normal.
Temperature sensor voltage is 0.08 V or less for 5 seconds or more.
3246-3 DPF Outlet Temperature Sensor Voltage Below Normal Open circuit or +B short circuit of sensor/harness.
Battery voltage is normal.
Coolant temperature is 50° C (122° F) or more continues longer than 10 minutes after engine starting.
T0 is between 100° C (212° F) and 800° C (1472° F) and continues longer than 10 seconds or T1 is between 100° C (212° F) and 800° C (1472° F) and continues longer than 10 seconds.
DPF outlet temperature sensor (T2) voltage is 4.92 V or more for 2 minutes or more.
3246-4 DPF Outlet Temperature Sensor Voltage Below Normal Battery voltage is normal.
Temperature sensor voltage is 0.08 V or less for 5 seconds or more.
4765-3 DOC Inlet Exhaust Temp Sensor Voltage Above Normal Coolant temperature is 50° C (122° F) or more continues longer than 5 minutes after engine starting.
T1 is between 100° C (212° F) and 800° C (1472° F) continues longer than 10 seconds or T2 is between 100° C (212° F) and 800° C (1472° F) continues longer than 10 seconds.
DOC inlet temperature sensor (T0) voltage is 4.92 V or more for 2 minutes or more.
4765-4 DOC Inlet Temperature Sensor Voltage Below Normal Battery voltage is normal.
Temperature sensor voltage is 0.08 V or less for 5 seconds or more. Note: A -3 code is detecting an open circuit or +B short circuit of the sensor or the wiring harness.Note: A -4 code is detecting a ground short circuit of the sensor or the wiring harness.
Illustration 1 g06111700
Mass air flow sensor (temperature sensor built in)
Illustration 2 g06111708
Boost pressure sensor (temperature sensor built in) - Turbocharged versions only
Illustration 3 g06111715
DOC inlet temperature sensor (T0)
Illustration 4 g06111720
DPF inlet temperature sensor (T1)
Illustration 5 g06111723
DPF outlet temperature sensor (T2)
Illustration 6 g06111727
Coolant temperature sensor
Table 2
Resistance of Temperature Sensors at Specific Temperatures
Temperature