BACK
Technical Service Information
DIAGNOSTIC TROUBLE CODES FOR THE ALLISON 1000/2000
“CHECK TRANS”
DTC DESCRIPTION
LAMP ON*
P0117 Engine Coolant Temperature Circuit Voltage Low (High Temp) NO
P0118 Engine Coolant Temperature Circuit Voltage High (Low Temp) NO
P0121 Pedal Position Sensor Performance Problem NO
P0122 Pedal Position Sensor Circuit Voltage Low YES
P0123 Pedal Position Sensor Circuit Voltage High YES
P0218 Transmission Fluid Over Temp NO
P0561 Unrealistic Variations In System Voltage NO
P0562 System Voltage Low YES
P0563 System Voltage High YES
P0602 TCM Not Programmed YES
P0606 Controller Internal Performance YES
P0613 TCM Processing Error NO
P0614 Torque Control Data Mismatch...ECM/TCM YES
P0634 TCM Internal Temperature Too High YES
P0658 Actuator Supply Voltage High Side Driver 1 Low YES
P0659 Actuator Supply Voltage High Side Driver 1 High YES
P0700 MIL Illumination Request YES
P0701 Transmission Control System Performance NO
P0703 Brake Switch Circuit Malfunction NO
P0705 Transmission Range Sensor Circuit (PRNDL Input) YES
P0706 Transmission Range Sensor Circuit Performance YES
P0708 Transmission Range Sensor Circuit Input High YES
P0710 Transmission Fluid Temperature Sensor Circuit Fault YES
P0711 Transmission Fluid Temperature Sensor Circuit Performance YES
P0712 Transmission Fluid Temperature Sensor Circuit Input Low (High Temp) YES
P0713 Transmission Fluid Temperature Sensor Circuit Input High (Low Temp) YES
P0716 Turbine Speed Sensor Circuit Performance YES
P0717 Turbine Speed Sensor Circuit No Signal YES
P0719 Brake Switch Circuit Fault NO
P0721 Output Speed Sensor Circuit Performance YES
P0722 Output Speed Sensor Circuit No Signal YES
P0726 Engine Speed Input Circuit Performance YES
P0727 Engine Speed Sensor Circuit No Signal YES
P0729 Incorrect 6th Gear Ratio YES
*The MIL Lamp may not illuminate on vehicles that are not OBD-II compliant
09-23
Page 1 of 5
AUTOMATIC TRANSMISSION SERVICE GROUP
BACK
Technical Service Information
DIAGNOSTIC TROUBLE CODES FOR THE ALLISON 1000
“CHECK TRANS”
DTC DESCRIPTION
LAMP ON*
P0731 Incorrect 1st Gear Ratio YES
P0732 Incorrect 2nd Gear Ratio YES
P0733 Incorrect 3rd Gear Ratio YES
P0734 Incorrect 4th Gear Ratio YES
P0735 Incorrect 5th Gear Ratio YES
P0736 Incorrect Reverse Gear Ratio YES
P0741 Torque Converter Clutch System Stuck Off YES
P0742 Torque Converter Clutch System Stuck On YES
P0743 Torque Converter Clutch PWM Solenoid Electrical Circuit Fault YES
P0746 Solenoid “A” Controlled Clutch Stuck Off YES
P0747 Solenoid “A” Controlled Clutch Stuck On YES
P0748 Pressure Control (Trim) Solenoid “A” Electrical Circuit Fault YES
P0751 Shift Solenoid 1 Performance (Stuck Off) YES
P0752 Shift Solenoid 1 Performance (Stuck On) YES
P0756 Shift Solenoid 2 Performance (Stuck Off) YES
P0757 Shift Solenoid 1 Performance (Stuck On) YES
P0761 Shift Solenoid 3 Performance (Stuck Off) YES
P0762 Shift Solenoid 3 Performance (Stuck On) YES
P0763 Shift Solenoid “C” Electrical Circuit Fault YES
P0768 Shift Solenoid “D” Electrical Circuit Fault YES
P0773 Shift Solenoid “E” Electrical Circuit Fault YES
P0776 Solenoid “B” Controlled Clutch Stuck Off YES
P0777 Solenoid “B” Controlled Clutch Stuck On YES
P0778 Pressure Control (Trim) Solenoid “B” Electrical Circuit Fault YES
P0826 Tap Up & Tap Down Shift Switch Circuit Fault NO
P0827 Tap Up & Tap Down Shift Switch Circuit Low NO
P0828 Tap Up & Tap Down Shift Switch Circuit High NO
P0836 Four Wheel Drive Low Switch Malfunction NO
P0840 Transmission Pressure Switch/Solenoid “C” (PS1) Circuit Fault YES
P0841 Transmission Pressure Switch/Solenoid “C” (PS1) Circuit Stuck Open YES
P0842 Transmission Pressure Switch/Solenoid “C” (PS1) Circuit Stuck Closed YES
P0843 Transmission Pressure Switch/Solenoid “C” (PS1) Circuit High YES
P0845 Transmission Pressure Switch/Solenoid “D” (PS2) Circuit Fault YES
P0846 Transmission Pressure Switch/Solenoid “D” (PS2) Circuit Stuck Open YES
*The MIL Lamp may not illuminate on vehicles that are not OBD-II compliant
09-23
Page 2 of 5
AUTOMATIC TRANSMISSION SERVICE GROUP
BACK
Technical Service Information
DIAGNOSTIC TROUBLE CODES FOR THE ALLISON 1000
“CHECK TRANS”
DTC DESCRIPTION
LAMP ON*
P0847 Transmission Pressure Switch/Solenoid “D” (PS2) Circuit Fault YES
P0848 Transmission Pressure Switch/Solenoid “D” (PS2) Circuit High YES
P0870 Transmission Pressure Switch/Solenoid “E” (PS3) Circuit Fault YES
P0871 Transmission Pressure Switch/Solenoid “E” (PS3) Circuit Stuck Open YES
P0872 Transmission Pressure Switch/Solenoid “E” (PS3) Circuit Stuck Closed YES
P0873 Transmission Pressure Switch/Solenoid “E” (PS3) Circuit High YES
P0875 Transmission Reverse Pressure Switch (PS4) Circuit Malfunction YES
P0876 Transmission Reverse Pressure Switch (PS4) Circuit Stuck Open YES
P0877 Transmission Reverse Pressure Switch (PS4) Circuit Stuck Closed YES
P0878 Transmission Reverse Pressure Switch (PS4) Circuit High YES
P0880 TCM Power Supply Loss NO
P0881 TCM Power Input Signal Performance Problem NO
P0882 TCM Power Supply Low NO
P0883 TCM Power Supply High NO
P0960 Pressure Control Solenoid (”G”) Main Mod Circuit Control Open NO
P0962 Pressure Control Solenoid (”G”) Main Mod Circuit Control Low YES
P0963 Pressure Control Solenoid (”G”) Main Mod Circuit Control High YES
P0964 Pressure Control Solenoid 2 (PCS 2) Control Circuit Open YES
P0966 Pressure Control Solenoid 2 (PCS 2) Control Circuit Low YES
P0967 Pressure Control Solenoid 2 (PCS 2) Control Circuit High YES
P0972 Shift Solenoid 1 (SS1) Control Circuit Open YES
P0973 Shift Solenoid 1 (SS1) Control Circuit Low YES
P0974 Shift Solenoid 1 (SS1) Control Circuit High YES
P0975 Shift Solenoid 2 (SS2) Control Circuit Open YES
P0976 Shift Solenoid 2 (SS2) Control Circuit Low YES
P0977 Shift Solenoid 2 (SS2) Control Circuit High YES
P0978 Shift Solenoid 3 (SS3) Control Circuit Open YES
P0979 Shift Solenoid 3 (SS3) Control Circuit Low YES
P0980 Shift Solenoid 3 (SS3) Control Circuit High YES
P1688 Unmanaged Engine Torque Delivered to TCM YES
P1709 See DTC P0870 YES
P1710 See DTC P0871 YES
P1711 See DTC P0872 YES
P1712 See DTC P0873 YES
*The MIL Lamp may not illuminate on vehicles that are not OBD-II compliant
09-23
Page 3 of 5
AUTOMATIC TRANSMISSION SERVICE GROUP
BACK
Technical Service Information
DIAGNOSTIC TROUBLE CODES FOR THE ALLISON 1000
“CHECK TRANS”
DTC DESCRIPTION
LAMP ON*
P1713 See DTC P0875 YES
P1714 See DTC P0876 YES
P1715 See DTC P0877 YES
P1716 See DTC P0878 YES
P1720 See DTC P0746 YES
P1721 See DTC P0776 YES
P1723 See DTC P0747 YES
P1724 See DTC P0777 YES
P1760 See DTC P0880 NO
P1779 Engine Torque Delivered to TCM Error NO
P1835 Kickdown Circuit Malfunction YES
P1860 See DTC P0743 YES
P1875 Four Wheel Drive Low Switch Circuit Fault NO
P1891 Throttle Position Sensor PWM Signal Input Low NO
P1892 Throttle Position Sensor PWM Signal Input High NO
P2637 Torque Management Feedback Signal-(SEM) Shift Energy Management -ECM Fault YES
P2641 Torque Management Feedback Signal-(LRTP) Lower Range Torque Protection-ECM Fault YES
P2670 Actuator Supply Voltage 2 (HSD2) High Side Driver Low YES
P2671 Actuator Supply Voltage 2 (HSD2) High Side Driver High YES
P2723 Pressure Control Solenoid 1 (PSC1) Stuck Off YES
P2724 Pressure Control Solenoid 1 (PSC1) Stuck On YES
P2727 Pressure Control Solenoid 1 (PSC1) Stuck Open YES
P2729 Pressure Control Solenoid 1 (PSC1) Stuck Low YES
P2730 Pressure Control Solenoid 1 (PSC1) Stuck High YES
P2761 Torque Converter Clutch Control Circuit Open YES
P2763 Torque Converter Clutch Control Circuit High YES
P2764 Torque Converter Clutch Control Circuit Low YES
P2771 See DTCs P0836 or P1875 NO
P2773 Torque Signal Request Sent By TCM Ignored By ECM YES
P2810 Solenoid “G” Electrical Circuit Fault YES
U0010 CAN 1 Bus Reset Counter Overrun-No Communication YES
U0031 J1850 (Class 2) Serial Data Communication Link Low NO
U0032 J1850 (Class 2) Serial Data Communication Link High NO
U0073 CAN 2 Bus Reset Counter Overrun-No Communication YES
*The MIL Lamp may not illuminate on vehicles that are not OBD-II compliant
09-23
Page 4 of 5
AUTOMATIC TRANSMISSION SERVICE GROUP
BACK
Technical Service Information
DIAGNOSTIC TROUBLE CODES FOR THE ALLISON 1000
“CHECK TRANS”
DTC DESCRIPTION
LAMP ON*
U0100 Lost Communication With ECM/PCM (CAN 1) YES (2004 ONLY)
U0115 Lost Communication With ECM/PCM (CAN 2) NO
U1000 Class 2 Loss of Serial Data Communication NO
U1016 Class 2 PCM State of Health Failure NO
U1041 Class 2 Anti-Lock Brake Controller (ABS) State of Health Failure NO
U1064 J1850 (Class 2) Truck Body Controller (TBC) State of Health Failure NO
U1096 Class 2 Instrument Panel Controller (IPC) State of Health Failure NO
U1300 See DTC U0031 NO
U1301 See DTC U0032 NO
U2104 See DTC U0073 NO
U2105 See DTC U0100 NO
U2106 Lost Communications with Transmission Control Systems
*The MIL Lamp may not illuminate on vehicles that are not OBD-II compliant
09-23
Page 5 of 5
AUTOMATIC TRANSMISSION SERVICE GROUP
