Truck's MID 128 Fault Codes DTC

Decryption of codes of malfunctions (DTC). Volvo, Renault, Mack Trucks - MID 128

 

The engine control unit

 

Diagnostic Trouble Code (DTC), DTC Code Name, DTC Type

 

 

MID 128 PID 21 FMI 3

Fan speed

The voltage at the contact of the EA6 engine block is higher than 65% of the battery voltage, a short to positive, a break in the power or ground wire, a sensor malfunction on the fan. The fan rotates at maximum speed, which causes high fuel consumption

 

MID 128 PID 21 FMI 8

Fan speed

The unit detected excess pulses in the fan speed signal, the wiring is damaged or the insulation of the wires is bad, the sensor on the fan is faulty, the fan is faulty. The fan rotates at maximum speed, which causes high fuel consumption

 

MID 128 PID 26 FMI 3

Estimated fan speed as a percentage

High voltage or short circuit to high voltage circuit

 

MID 128 PID 26 FMI 8

Estimated fan speed as a percentage

Abnormal frequency, pulse width or period

MID 128 PID 45 FMI 3

Intake Air Heater Status

High voltage or short circuit to high voltage circuit. The wire between the control unit from terminal EB31 and the K48 relay closes to a constant plus, the K48 relay is faulty. Starting in cold weather is difficult. The code is only active if the ignition key is in the preheating position (between the ignition on position and the start position)

 

MID 128 PID 45 FMI 4

Intake Air Heater Status

Low voltage or short circuit to a circuit with a lower voltage. The wire between the control unit from terminal EB31 and relay K48 closes to ground, the preheating relay K48 is faulty. The air heater is constantly activated, as a result of overheating, the heating coil may be destroyed and parts of the spiral may get into the intake manifold and valve mechanism

 

MID 128 PID 45 FMI 5

Intake Air Heater Status

Below current or open circuit. Open circuit, fuse for heating relay fuse blown, wire break between control unit and relay, relay power wire break. Heating does not turn on; starting in cold weather is difficult.

 

MID 128 PID 81 FMI 0

Particle Filter Pressure Difference

Data is reliable but is above normal operating range.

 

MID 128 PID 81 FMI 2

Particle Filter Pressure Difference

Irregular, erratic, or incorrect data

 

MID 128 PID 81 FMI 3

Particle Filter Pressure Difference

High voltage or short circuit to high voltage circuit

 

MID 128 PID 81 FMI 5

Particle Filter Pressure Difference

Below current or open circuit

MID 128 PID 81 FMI 12

Particle Filter Pressure Difference

Faulty device or component

 

MID 128 PID 84 FMI 9

Vehicle speed

Abnormal refresh rate. Faulty speed sensor, error of data channel data SAE J1708, error in the vehicle control unit (VECU). If FMI 11 is present, the speed does not exceed 1700 rpm. Check integrity of data channel wiring

 

MID 128 PID 84 FMI 11

Vehicle speed

Missing or incorrect speed signal transmitted via the SAE J1939 data channel, the speed sensor is faulty, the SAE J1939 data channel is faulty, the vehicle control unit (VECU) is faulty. The speed signal is transmitted via the SAE J1708 data channel. If FMI 9 is present, the speed does not exceed 1700 rpm. Check integrity of data channel wiring

 

MID 128 PID 85 FMI 9

Cruise Control States

Abnormal refresh rate. Error data channel data SAE J1708, an error in the vehicle control unit (VECU). Check integrity of data channel wiring

 

MID 128 PID 91 FMI 9

Accelerator pedal position,%

Abnormal refresh rate. The signal of the position of the accelerator pedal is incorrect or missing, the sensor on the accelerator pedal is faulty, the data channel is SAE J1587 / J1708, the error is in the vehicle control unit (VECU).

MID 128 PID 91 FMI 11

Accelerator pedal position,%

The pedal position signal is not transmitted through the data channel SAE J1939, the sensor on the accelerator pedal is faulty, the data channel SAE J1939 is faulty, the error is in the vehicle control unit. If FMI 9 is present, the unit enters idle mode. Check the integrity of the data channel, replace the accelerator pedal

 

MID 128 PID 94 FMI 1

Fuel supply pressure

The data are reliable, but are below the normal operating range. For D6B, D7C, D10B, D12C engines: Fuel pressure is below normal. The fuel filter is clogged, fuel leakage, air leaks, the bypass valve opens at low pressure, the mechanical pump does not pump well or the sensor is faulty. Perform a fuel pressure check with a pressure gauge. For D16B engine: Fuel pressure is above normal (more than 700 kPa). The fuel filter is clogged, the bypass valve does not open

 

MID 128 PID 94 FMI 3

Fuel supply pressure

High voltage or short circuit to high voltage circuit. The voltage at the EA27 contact of the engine block is higher than 4.95 V. The wire is shorted to power or to the signal wire. Probably defective sensor

 

MID 128 PID 94 FMI 4

Fuel supply pressure

The voltage at the EA27 contact of the unit is below 0.08 V. An open to the power wires, signal or ground of the fuel pressure sensor. Probably defective sensor

 

MID 128 PID 94 FMI 5

Fuel supply pressure

Below current or open circuit

 

MID 128 PID 94 FMI 7

Fuel supply pressure

The mechanical system does not respond properly. Fuel pressure below normal. The fuel filter is clogged, fuel leakage, air leakage, the bypass valve opens at low pressure, the mechanical pump does not pump well, the sensor is faulty. Perform a fuel pressure check with a pressure gauge

 

MID 128 PID 97 FMI 3

Fuel water indicator

High voltage or short circuit to high voltage circuit. The voltage at the contact of the EB6 block exceeds 91% of the battery voltage. Short to power or signal wire, open signal wire. The indicator may be malfunctioning

 

MID 128 PID 97 FMI 4

Fuel water indicator

Low voltage or short circuit to a circuit with a lower voltage. The voltage at the contact of the EB6 block is below 5% of the battery voltage. Short to negative or to signal wire. The indicator may be malfunctioning

 

MID 128 PID 97 FMI 5

Fuel water indicator

Below current or open circuit

 

MID 128 PID 97 FMI 14

Fuel water indicator

Special instructions. The code informs that the electric fuel pump is switched on. Not a DTC

 

MID 128 PID 98 FMI 1

Engine oil level

The data are reliable, but are below the normal operating range. Low oil, level sensor defective.

 

MID 128 PID 98 FMI 4

Engine oil level

Low voltage or short circuit to a circuit with a lower voltage. The voltage at the terminals of the EB15-EB22 is lower than 0.5 V. A short to negative or to a signal wire. Level sensor may be defective

 

MID 128 PID 98 FMI 5

Engine oil level

Below current or open circuit. The voltage at the terminals of the EB15-EB22 is higher than 4.95 V. Breakage of the signal wire or ground wire. Short to power or ground wire. Probably defective sensor

 

MID 128 PID 100 FMI 1

Engine oil pressure

The data are reliable, but are below the normal operating range. Low oil level. Liquid, thick, dirty oil. Possible bypass valves, oil pump, pressure sensor

 

128 PID 100 FMI 3

Engine oil pressure

High voltage or short circuit to high voltage circuit. The voltage at the contact of the EA14 block is higher than 4.95 V. A short to voltage or signal. Possible defective defective sensor

 

MID 128 PID 100 FMI 5

Engine oil pressure

Below current or open circuit. The voltage at the contact of the EA14 block is below 0.08 V. Breakage of the power wire or sensor signal. Short to negative or to signal wire. Probably defective sensor

MID 128 PID 102 FMI 0

Boost pressure

Data is reliable but is above normal operating range.

 

MID 128 PID 102 FMI 2

Boost pressure

Irregular, erratic, or incorrect data

 

MID 128 PID 102 FMI 3

Boost pressure

High voltage or short circuit to high voltage circuit. The voltage at the contact of the EA3 block is higher than 4.95 V. A short to voltage or signal. Probably defective sensor

 

MID 128 PID 102 FMI 5

Boost pressure

Below current or open circuit. The voltage at the contact of the EA3 block is lower than 0.08 V. A break in the power wire or sensor signal. Short to negative or to signal wire or sensor defective

 

MID 128 PID 102 FMI 8

Boost pressure

Abnormal frequency, pulse width or period

 

MID 128 PID 102 FMI 9

Boost pressure

Abnormal refresh rate

 

MID 128 PID 102 FMI 12

Boost pressure

Faulty device or component

 

MID 128 PID 102 FMI 14

Boost pressure

Special instructions

 

MID 128 PID 103 FMI 8

Turbocharger Speed No. 1

Abnormal frequency, pulse width or period

 

MID 128 PID 103 FMI 1

Turbocharger Speed No. 1

Data is reliable but below normal operating range.

 

MID 128 PID 103 FMI 14

Turbocharger Speed No. 1

Special instructions

 

MID 128 PID 105 FMI 0

Turbocharger Speed No. 1

Data is reliable but is above normal operating range.

 

MID 128 PID 105 FMI 2

Turbocharger Speed No. 1

Irregular, erratic, or incorrect data

 

MID 128 PID 105 FMI 3

Turbocharger Speed No. 1

The voltage at the contact of the EA2 block is higher than 4.95 V. Short circuit to the power or signal wire or the sensor is faulty

 

MID 128 PID 105 FMI 4

Turbocharger Speed No. 1

Low voltage or short circuit to a circuit with a lower voltage. The voltage at the contact of the engine block EA2 is lower than 0.08 V. An open of the power wire or sensor signal. Short to negative or to signal wire or sensor defective

 

MID 128 PID 105 FMI 5

Turbocharger Speed No. 1

Below current or open circuit

 

MID 128 PID 105 FMI 10

Turbocharger Speed No. 1

Fluctuations too big

 

MID 128 PID 107 FMI 0

Pressure drop in the air filter

The data are reliable, but are above the normal operating range. Large differential pressure, clogged air filter or defective differential pressure sensor on the air filter

MID 128 PID 107 FMI 3

Pressure drop in the air filter

High voltage or short circuit to high voltage circuit. The voltage at the EB3 contact of the engine block from the sensor on the air filter exceeds 91% of the battery voltage. Short to power, signal or ground. Probably defective sensor

 

MID 128 PID 107 FMI 4

Pressure drop in the air filter

Low voltage or short circuit to a circuit with a lower voltage. The voltage at the EB3 contact of the engine block from the sensor on the air filter is less than 9% of the battery voltage. Short to ground or signal wire or sensor defective

 

MID 128 PID 107 FMI 5

Pressure drop in the air filter

Below current or open circuit. The voltage at the EB3 contact of the engine block from the sensor on the air filter is from 63 to 91% of the battery voltage. Open wire signal, ground or defective sensor

 

MID 128 PID 108 FMI 2

Atmosphere pressure

Irregular, erratic, or incorrect data

 

MID 128 PID 108 FMI 3

Atmosphere pressure

High voltage or short circuit to high voltage circuit. The sensor signal is higher than 4.95 V. The engine block is faulty.

 

MID 128 PID 108 FMI 4

Atmosphere pressure

Low voltage or short circuit to a circuit with a lower voltage. Sensor signal below 0.08V. Faulty engine block

 

MID 128 PID 110 FMI 0

Engine Coolant Temperature

The data are reliable, but are above the normal operating range. The temperature of the coolant exceeds 102 degrees. There is no liquid, thermostat or water pump malfunction, the radiator of the cooling system is clogged inside or outside, the intercooler (intercooler) is clogged outside or the liquid temperature sensor is faulty

 

MID 128 PID 110 FMI 2

Engine Coolant Temperature

Irregular, erratic, or incorrect data

 

MID 128 PID 110 FMI 3

Engine Coolant Temperature

The voltage at pin EA25 from the temperature sensor is higher than 4.95 V. The signal wire is shorted to the power wire. Broken ground wire or signal. Probably defective sensor

 

MID 128 PID 110 FMI 4

Engine Coolant Temperature

Low voltage or short circuit to a circuit with a lower voltage. The voltage at pin EA25 from the temperature sensor is below 0.08 V. The signal wire is shorted to ground, the sensor is faulty

 

MID 128 PID 110 FMI 5

Engine Coolant Temperature

Below current or open circuit

 

MID 128 PID 110 FMI 7

Engine Coolant Temperature

The mechanical system does not respond properly

 

MID 128 PID 110 FMI 10

Engine Coolant Temperature

Fluctuations too big

 

MID 128 PID 110 FMI 14

Engine Coolant Temperature

Special instructions

 

MID 128 PID 111 FMI 1

Coolant level

The data are reliable, but are below the normal operating range. The voltage at the EB7 contact of the engine block from the level sensor is less than 45% of the battery voltage. Low coolant or short to ground on signal wire. Probably defective sensor

 

MID 128 PID 111 FMI 3

Coolant level

High voltage or short circuit to high voltage circuit. The voltage on the EV7 of the engine block from the level sensor exceeds 95% of the battery voltage. Short to power wire, 24V circuit or signal wire or level sensor defective

MID 128 PID 111 FMI 4

Coolant level

There is no voltage at the EB7 contact of the engine block from the level sensor. Short to ground or signal wire. Level sensor may be defective

 

MID 128 PID 111 FMI 5

Coolant level

Abnormal current or open circuit

 

MID 128 PID 131 FMI 2

Exhaust back pressure

Irregular, erratic, or incorrect data

 

MID 128 PID 131 FMI 3

Exhaust back pressure

High voltage or short circuit to high voltage circuit