Service technicians have no problem recognising breakdowns and carrying out machine diagnostics, Allison Transmission Fault Codes, plus they are familiar with equipment from a variety of manufacturers.
Error code table, automatic transmission Series 3000, 4000 with electronic control system Gen 4
Error code | Description | Lamp Check trans | Control system response |
C1312 | Retarder trigger low voltage | off | Retarder does not turn on |
C1313 | Retarder trigger signal high voltage | off | Retarder does not turn on |
P0122 | Intermittent or low gas pedal position sensor signal | off | Default value is used |
P0123 | High gas pedal position sensor | off | Default value is used |
P0218 | Oil temperature is too high | off | A control pattern is used in case of temperature rise. Holds 4th gear. Prohibition of torque converter lock. Gear shift adaptation is deactivated. |
P0562 | Control unit low voltage | off | Prohibition of torque converter lockout. DNA |
P0602 | The control unit is not programmed | On | Remains neutral |
P0610 | Error of additional equipment of the car with the control unit | On | Uses TID A Calibration Data |
P0613 | Control Unit CPU Error | off | All solenoids are off |
P0614 | Incompatibility of ECM and TCM data for engine torque control | On | Only neutral, reverse and second gear. Torque lock inhibit, shift adaptation disabled |
P0634 | Control unit temperature exceeded | On | DNS , SOL OFF , actively hydraulic control. |
P063E | There is no input signal about the position of the throttle during auto detection | On | Default value is used |
P063F | No coolant temperature signal during auto detection | off | – |
P0657 | Open circuit HSD1 | On | SOL OFF , DNA . Prohibition of torque converter lock, prohibition of main modulation. |
P0658 | Low voltage in the HSD circuit 1 | On | DNS , SOL OFF , hydraulic control is active |
P0659 | High voltage in the HSD circuit 1 | On | DNS , SOL OFF , hydraulic control is active |
P0702 | The control unit did not recognize the automatic transmission configuration | On | Uses standard configuration |
P0703 | Malfunction in a chain of the gauge of a brake | off | On garbage trucks, the inclusion of N – D is not possible . If the code is active, then the retarder is prohibited. |
P0708 | High signal from the current gear sensor. | On | Ignores the signal of the strip switch |
P070C | Low oil level sensor signal | off | – |
P070D | High oil level sensor signal | off | – |
P0711 | Abnormal oil temperature sensor signal | On | Uses the default temperature |
P0712 | Low oil temperature sensor signal | On | Uses standard temperature |
P0713 | High oil temperature sensor signal | On | It uses the standard value tamper Aturi |
P0716 | Turbine wheel speed sensor abnormal signal | On | DNS , automatic transmission is blocked on the current transfer |
P0717 | No turbine wheel speed sensor signal | On | DNS , automatic transmission is blocked on the current transfer |
P0719 | ABS brake signal low | off | Takes ABS off |
P071A | Incompatible RELS Input | On | RELS function is disabled |
P071D | Incorrect special function input (wire 101 and 142) | On | – |
P0721 | Abnormal output speed sensor signal | On | DNS , automatic transmission remains in the current transmission
|
P0722 | No output speed sensor signal | On | DNS , automatic transmission remains in the current transmission |
P0726 | Abnormal engine speed sensor signal | off | Uses standard turbine speed |
P0727 | Missing engine speed sensor signal | off | Uses standard turbine speed |
P0729 | 6th gear ratio incorrect | On | DNS , trying to enable 5th , then 3rd gear |
P0731 | 1st gear ratio incorrect | On | DNS , trying to enable 2nd, then 5th gear |
P0732 | 2nd gear ratio incorrect | On | DNS , trying to enable 3rd, then 5th gear |
P0733 | 3rd gear ratio incorrect | On | DNS , trying to enable 4th, then 6th gear |
P0734 | 4th gear ratio incorrect | On | DNS , trying to turn on 5th, then 3rd gear |
P0735 | 5th gear ratio incorrect | On | DNS , trying to turn on the 6th, then 3rd, then 2nd gear |
P0736 | Incorrect gear ratio in reverse gear | On | DNS blocked on neutral |
P0741 | Torque converter slip clutch slides | On | – |
P0752 | Jamming solenoid SS 1 pressure control valve | On | DNS |
P0776 | Malfunction in the hydraulic circuit of the PCS 2 solenoid | On | DNS, RPR |
P0777 | Malfunction in the hydraulic circuit of the PCS 2 solenoid | On | DNS, RPR |
P0796 | Malfunction in the hydraulic circuit of the PCS 3 solenoid | On | DNS, RPR |
P0797 | Malfunction in the hydraulic circuit of the PCS 3 solenoid | On | DNS, RPR |
P0842 | PS voltage sensor low voltage 1. | On | DNS , automatic transmission remains in the current transmission |
P0843 | Pressure Sensor High Voltage PS 1. | On | DNS , automatic transmission remains in the current transmission |
P0847 | PS 2 pressure sensor low voltage | On | – |
P0848 | High voltage pressure sensor PS 2 | On | – |
P0880 | Power failure of the control unit during engine operation | off | – |
P0881 | The voltage at the control unit is too low or is skipping | off | – |
P0882 | The voltage at the control unit is below normal. | On | DNS , SOL OFF ,
hydraulic control is active |
P0883 | The voltage on the control unit is above normal | off | – |
P088A | Oil filter clogged | off | – |
P088B | Oil filter heavily clogged | off | – |
P0894 | No torque transmission in first gear | On | DNS remains in 1st gear |
P0897 | Gear oil needs to be replaced | On | – |
P0960 | Open circuit pressure modulation valve solenoid | On | – |
P0962 | Low voltage modulation valve solenoid circuit | On | DNS , SOL OFF , hydraulic control active |
P0963 | High voltage in the pressure modulation valve solenoid circuit | On | – |
P0964 | PCS2 Solenoid Open Circuit | On | DNS , SOL OFF , hydraulic control active |
P0966 | PCS 2 Solenoid Circuit Low Voltage | On | DNS , SOL OFF ,
hydraulic control is active |
P0967 | PCS 2 Solenoid High Voltage | On | DNS , SOL OFF ,
hydraulic control is active |
P0968 | PCS3 Solenoid Open Circuit | On | DNS , SOL OFF ,
hydraulic control is active |
P0970 | PCS 3 Solenoid Circuit Low Voltage | On | DNS , SOL OFF ,
hydraulic control is active |
P0971 | PCS 3 Solenoid Circuit High Voltage | On | DNS , SOL OFF ,
hydraulic control is active |
P0973 | Low voltage in the solenoid circuit SS 1 | On | DNS , SOL OFF ,
hydraulic control is active |
P0974 | High voltage in the solenoid circuit SS 1 | On | DNS , SOL OFF ,
hydraulic control is active |
P0975 | Open circuit solenoid SS2 | On | On 7-speed automatic transmissions, 1st and 7th gears are not included |
P0976 | Low voltage in the solenoid circuit SS 2 | On | On 7-speed automatic transmissions, 1st and 7th gears are not activated, torque converter lockout |
P0977 | High voltage in the solenoid circuit SS 2 | On | On 7-speed automatic transmissions, 1st and 7th gears are not included |
P0989 | The signal from the retarder is intermittent | off | Retarder does not turn on |
P0990 | Retarder sensor signal has a short circuit | off | Retarder does not turn on |
P1739 | Incorrect gear ratio in low gear | On | DNS , prohibition of work in 1 gear |
P1891 | Accelerator pedal position sensor signal below normal | off | Uses the standard value for pedal depression |
P1892 | Accelerator Pedal Position Sensor Signal Above Normal | off | Uses the standard value for pedal depression |
P2184 | Coolant temperature sensor signal low voltage | off | Uses standard temperature |
P2185 | Coolant Temperature Sensor High Voltage | off | Uses standard temperature |
P2637 | Malfunction of the torque control system when shifting gears SEM | On | Disabling SEM |
P2641 | Violation of the torque limiting system in the lower gears of LRTP | On | Disabling LRTP |
P2669 | Open circuit HSD2 | On | SOL OFF , torque converter inhibit inhibit, main modulation inhibit, DNA |
P2670 | HSD 2 low voltage | On | DNS , SOL OFF , hydraulic control active |
P2671 | High voltage in the HSD 2 circuit | On | DNS , SOL OFF , hydraulic control active |
P2684 | Open circuit HSD3 | On | SOL OFF , torque converter inhibit inhibit, main modulation inhibit, DNA |
P2685 | HSD 3 Low Voltage | On | DNS , SOL OFF ,
hydraulic control is active |
P2686 | HSD 3 High Voltage | On | DNS , SOL OFF ,
hydraulic control is active |
P2714 | Malfunction in the hydraulic circuit of the PCS 4 solenoid | On | DNS, RPR |
P2715 | Malfunction in the hydraulic circuit of the PCS 4 solenoid | On | DNS , SOL OFF ,
hydraulic control is active |
P2718 | PCS4 Solenoid Open Circuit | On | DNS , SOL OFF ,
hydraulic control is active |
P2720 | PCS 4 Solenoid Circuit Low Voltage | On | DNS , SOL OFF ,
hydraulic control is active |
P2721 | PCS 4 Solenoid High Voltage | On | DNS , SOL OFF ,
hydraulic control is active |
P2723 | Malfunction in the hydraulic circuit of the PCS 1 solenoid | On | DNS, RPR |
P2724 | Malfunction in the hydraulic circuit of the PCS 1 solenoid | On | DNS, RPR |
P2727 | PCS1 Solenoid Open Circuit | On | DNS , SOL OFF ,
hydraulic control is active |
P2729 | Low voltage in the PCS 1 solenoid circuit | On | DNS , SOL OFF ,
hydraulic control is active |
P2730 | High voltage in the PCS 1 solenoid circuit | On | DNS , SOL OFF ,
hydraulic control is active |
P2736 | PCS5 Solenoid Open Circuit | On | Prohibition of retarder operation |
P2738 | PCS 5 Solenoid Circuit Low Voltage | On | Prohibition of work in 1st gear, retarder operation, torque converter lock |
P2739 | PCS 5 Solenoid Circuit High Voltage | On | Prohibition of retarder operation |
P2740 | High temperature oil retarders | off | – |
P2742 | Retarder oil temperature sensor low signal | off | Uses standard oil temperature |
P2743 | Retarder oil temperature sensor high signal | off | Uses standard oil temperature |
P2761 | Torque converter solenoid open circuit | On | Torque converter lockout |
P2763 | Low voltage in the torque converter lock-up solenoid circuit | On | Torque converter lockout |
P2764 | High voltage lock-up torque converter solenoid circuit | On | Torque converter lockout |
P2789 | Clutch wear reaches limit value | On | – |
P278A | Wrong Kickdown Signal | off | Kickdown mode ban |
P2793 | Gear Shift Communication Error | On | Ignores PWM control, if the signal through the CAN – bus is also lost, the latter is locked in a selected direction |
P2808 | Malfunction in the hydraulic circuit of the PCS 6 solenoid | On | DNS, RPR |
P2809 | Malfunction in the hydraulic circuit of the PCS 6 solenoid | On | DNS, RPR |
P2812 | PCS6 Solenoid Open Circuit | On | DNS , SOL OFF ,
hydraulic control is active |
P2814 | PCS 6 Solenoid Circuit Low Voltage | On | DNS , SOL OFF ,
hydraulic control is active |
P2815 | PCS 6 Solenoid Circuit High Voltage | On | DNS , SOL OFF ,
hydraulic control is active |
U0001 | High Speed CAN Bus Counter Overflow ( IESCAN ) | off | Uses standard values; disables torque control when shifting gears |
U0010 | CAN Bus Counter Overflow ( IESCAN ) | off | Uses standard values; disables torque control when shifting gears |
U0100 | Loss of communication with the engine / power unit ( J 1586) | On | Uses default values |
U0103 | Lost Communication With First Gear Shift | On | Remains in the selected gear, monitors the signal for changing the direction of movement. The display goes blank for 10 seconds, then shows – / – – / – |
U0115 | Communication error with engine control unit | On | Uses standard values, DNA |
U0291 | Communication error with the secondary gear shifter | On | Remains in the selected gear, monitors the signal for changing the direction of movement. The display goes blank for 10 seconds, then shows – / – – / – |
U0304 | Primary gear selector not compatible with J 1939 protocol | On | DNS blocked in neutral |
U0333 | Secondary switch not compatible with J 1939 protocol | On | DNS blocked in neutral |
U0400 | Violation of data transmission protocol J 1939 | On | – |
U0404 | Inadequate information from the primary gear shifter | On | Remains in the selected gear, monitors the signal for changing the direction of movement. The display goes blank for 10 seconds, then shows – / – – / – |
U0442 | The control unit receives incorrect data from the engine / powertrain control unit included in data bus J 1939 | off | – |
U0592 | Inadequate information from the secondary gear shifter | On | Remains in the selected gear, monitors the signal for changing the direction of movement. The display goes blank for 10 seconds, then shows – / – – / – |