Allison 1000 & 2000 Gen 4 Fault Codes: P1779 Engine Torque Delivered To TCM Signal CIRCUIT DESCRIPTION:The GM 8.1 liter...

Allison 1000 & 2000 Gen 4 Fault Codes: P1891 Engine Throttle Position Sensor Pulse Width Modulation (PWM) Signal Low Input...

Allison 1000 & 2000 Gen 4 Fault Codes: P1892 Throttle Position Sensor Pulse Width Modulation (PWM) Signal High Input CIRCUIT...

Allison 1000 & 2000 Gen 4 Fault Codes: P2771 Four-Wheel Drive Switch Circuit CIRCUIT DESCRIPTION:Detects abnormal conditions for the four-wheel...

Allison 1000 & 2000 Gen 4 Fault Codes: P2773 Torque Control Request Ignored – ECM/TCM CIRCUIT DESCRIPTION:Shift Energy Management (SEM)...

Allison 1000 & 2000 Gen 4 Fault Codes: P2810 Solenoid G Electrical CIRCUIT DESCRIPTION:Solenoid G is a normally closed (N/C)...