Fault Codes
VOLVO TRUCK ENGINES TD 122, TD123, TD 103, TD 163 FAULT CODES
Code Description Cause and response.
1 EDC unit is connected incorrectly (for TD122FS only). . EDC unit does not meet the specifications of the car.
2 Errors in the program memory unit EDC. The engine will not start. Replace the control unit.
3 does not complete the brake pedal is depressed. With this code with no other fault codes and the lack of faults in air pressure sensor circuit brake pedal lamp "Check Engine" should go out after 4 seconds after you press and hold the brake pedal is further .. Faulty wiring in air pressure sensor circuit brake pedal or defective sensor. It does not work the system maintain the set speed.
4 No engine speed signal from the generator and pump. The engine is not running (off) or cause manifestations of this error codes are 5 or 6.
5 Missing or invalid signal for the engine speed of the pump speed sensor. Faulty speed sensor pump or damaged wiring between the fuel pump and blokomEDC. EDC unit uses the signal of the engine speed from the generator.
6 Missing or invalid signal for the engine speed of the generator. Loose or damaged drive belts generator, the generator is faulty or defective wiring of the generator contact "W".
7 Tachograph informs EDC unit that the vehicle speed is too high. Not performed or is unsuccessful calibration of tachographs, tachograph calibration code is different from the EDC block of code, the wrong signal from the tachograph. EDC unit reduces the engine speed (for vehicles with a speed limiter).
8 Missing or invalid vehicle speed signal. Incorrect signal from the tachograph or damaged wiring. Cruise control uses the signal of the engine rotation speed instead of the road speed signal.
9, the charge air temperature is too high (more than 90 ° C). Faulty temperature sensor discharge air or damaged wiring, clogged intercooler (intercooler) defective bypass valve. Engine output reduced.
10 Temperature of combustion air is too low Faulty discharge air temperature sensor or wiring is damaged. Engine output reduced.
11, the charge air temperature is too high (above 100 ° C). Faulty sensor discharge air temperature or damaged wiring, signal wire shorted to ground. Engine output reduced.
12, the coolant temperature is too low. Faulty coolant temperature sensor or wiring is damaged. Engine output reduced.
13 Coolant temperature too high. Faulty coolant temperature sensor wiring damaged faulty water pump, faulty thermostat, clogged honeycomb cooling radiator. Engine output reduced.
14 Air pressure too low boost. Faulty air boost pressure sensor or wiring is damaged. Engine output reduced.
15 The pressure charge air is too high (for TD122FS engine only). Faulty air boost pressure sensor or wiring is damaged. Fuel flow is temporarily reduced.
16 of the accelerator pedal sensor produces low voltage. Faulty sensor wiring or the pedal. The motor rotates at a constant speed (approximately 600 rpm / min.).
17 of the accelerator pedal sensor produces very high voltage. Faulty sensor wiring or the pedal. The motor rotates at a constant speed (approximately 600 rpm / min.).
18 No EDC fault indication or unsatisfactory conditions to adjust the engine idle. Faulty EDC unit.
19 Internal communication error. Faulty EDC unit. motor control is carried out in an emergency.
20 Critical fault in the engine management system. The big difference between the actual and expected position of the injection pump control rack. The engine stops.
21 Incorrect position of the fuel pump of a high pressure rail (lower position). Malfunction of the injection pump rack. Can stop the engine.
22 Incorrect position of the fuel pump of a high pressure rail (high position). Invalid or no signal from the control pump mechanism.
23 Internal communication error. Faulty EDC unit. Engine control is absent.
VOLVO FH12 WITH ENGINE D12A FAULT CODES
Code Description Cause and response.
11 Accelerator pedal. Faulty sensor of the accelerator pedal or damaged wiring between the motor and pedal control unit. Incomplete accelerator pedal possible sharp increase in engine speed.
Idling switch 12 of the accelerator pedal. Faulty sensor of the accelerator pedal or damaged wiring between the motor and pedal control unit. accelerator pedal depression does not respond.
13 Vehicle speed signal. Faulty wiring, faulty instrument cluster is faulty Tachograph. Cruise control does not work until the fault code is active.
14 relay power the engine control unit. Faulty relay or damaged wiring.
21 Internal fault in the engine control unit. Defective engine control unit. Cruise control does not work.
22 Program error in the engine control unit. Do not programmed or programmed with errors the engine control unit. The engine will not start.
23, the coolant temperature sensor. Faulty sensor wiring is damaged, the water pump is working part-time performance, packed with honeycomb radiator or faulty thermostat.
24 Temperature of combustion air. Faulty sensor wiring damaged, clogged honeycomb intercooler (intercooler), mechanical malfunction of the engine. At a temperature of combustion air above 91 ° C lamp "Check Engine" lights steadily, and the engine power will be reduced. In the event of a fault in the wiring harness or the defective sensor lamp "Check Engine" will blink.
25 The pressure of the charge air. Faulty sensor wiring damaged defective turbocharger is damaged or clogged intercooler, engine mechanical fault. Reduced engine power, increased exhaust emissions.
26 camshaft speed sensor. Faulty sensor camshaft speed, damaged wiring, broken synchronization between the signals from the speed sensor and camshaft rotation of the crankshaft sensor. In case of violation of synchronization codes will be active on 26 and 27 simultaneously. Engine runs for a long time or may not start on the first try.
The sensor 27 of the engine speed. Faulty sensor engine speed, damaged wiring, broken synchronization between the signals from the speed sensor and camshaft rotation of the crankshaft sensor. In case of violation of synchronization codes will be active on 26 and 27 simultaneously. Engine runs for a long time or may not start on the first try.
31 Pump-injector cylinder №1. Faulty unit injector, damaged wiring between engine control unit and the pump -forsunkoy, mechanical failure in the engine. The engine does not operate smoothly, it can be increased opacity of the exhaust gases.
32 №2 cylinder pump injector. Faulty unit injector, damaged wiring between engine control unit and the pump -forsunkoy, mechanical failure in the engine. The engine does not operate smoothly, it can be increased opacity of the exhaust gases.
33 Pump-injector cylinder №3. Faulty unit injector, damaged wiring between engine control unit and the pump -forsunkoy, mechanical failure in the engine. The engine does not operate smoothly, it can be increased opacity of the exhaust gases.
34 №4 cylinder pump injector. Faulty unit injector, damaged wiring between engine control unit and the pump -forsunkoy, mechanical failure in the engine. The engine does not operate smoothly, it can be increased opacity of the exhaust gases.
35 №5 cylinder pump injector. Faulty unit injector, damaged wiring between engine control unit and the pump -forsunkoy, mechanical failure in the engine. The engine does not operate smoothly, it can be increased opacity of the exhaust gases.
36 №6 cylinder pump injector. Faulty unit injector, damaged wiring between engine control unit and the pump -forsunkoy, mechanical failure in the engine. The engine does not operate smoothly, it can be increased opacity of the exhaust gases.
Information codes (are not the fault codes).
Code Description Reaction
41 Do not carry out a check of brakes or faulty brake pedal. It does not work and the cruise control function "RESUME".
42 Active signal to the lamp warning of braking. on lamp signal interrupts the cruise control system and prevents the installation of a constant engine speed for PTO.
Active signal 43 from the brake pedal sensor. The signal from the sensor interrupts the cruise control system and prevents the installation of a constant engine speed for PTO.
44 Switch idling accelerator pedal is active (accelerator pedal fully depressed).
45 Contact open clutch pedal (clutch pedal is partially or fully pressed). The signal from the clutch pedal interrupts the cruise control on and off manually set a constant engine speed.
46 The signal from the parking brake activated. The signal is a condition for the possibility to set manually a constant engine speed for PTO.
47 The safety signal is active. With active safety signal, the engine does not respond, the motor force goes into idle mode at a speed of 0 km / h, or the engine is switched off (depending on the security modes programmed into the engine control unit).
51 Cruise control is switched on. The signal from the cruise control switch is a condition for the cruise control and the possibility to install in ruchnuyupostoyannuyu motor speed for power take-off.
52 Active signal from the buttons "ON" and "SET" switch on the cruise control. When vehicle cruise control is activated. When the car stopped, activates the ability to install manually a constant engine speed for PTO.
53 Active signal from the buttons "ON" and "RESUME" on the cruise control switch. During the velocity renews the movement defined previously. When the car stopped, the engine speed increases or decreases to approximately 1000 rev / min.
61 ABS active signal. Engine Brake (VEB) does not function.
62 Communication with the control unit box Geartronic transmission. If no signal is Geartronic does not function.
63 Active VSP signal (engine control unit is in programming mode). The engine will not start.
Erasing the recorded DTCs.
1. Switch off the ignition for at least 10 seconds;
2. Press and hold the diagnostic button "Check Engine";
3. Turn the ignition switch;
4. Hold down the diagnostic button "Check Engine" approximately 3-4 seconds;
5. Release the button.
Registered codes in the memory of the engine control unit will be erased and will not appear before the failure.
