13 March, 2025 Allison 1000 & 2000 Gen 5 Fault Code:P0777 Pressure Control Solenoid 2 (PCS2) – Stuck On CIRCUIT DESCRIPTION:Pressure Control Solenoid 2 (PCS2) controls oncoming, off-going, and holding pressure to any one of the five clutches. This...
13 March, 2025 Allison 1000 & 2000 Gen 5 Fault Code:P0837 Four Wheel Drive (4WD) Switch Circuit Range/Performance CIRCUIT DESCRIPTION:The 4WD low signal circuit notifies the TCM that the vehicle is in 4WD low range. When this function...
13 March, 2025 Allison 1000 & 2000 Gen 5 Fault Code:P0842 Transmission Pressure Switch 1 (PS1) Circuit – Low CIRCUIT DESCRIPTION:The Pressure Switch Manifold (PSM) is a multiple-switch assembly made up of three Normally Open (N/O) and one Normally...
13 March, 2025 Allison 1000 & 2000 Gen 5 Fault Code:P0843 Transmission Pressure Switch 1 (PS1) Circuit – High CIRCUIT DESCRIPTION:The Pressure Switch Manifold (PSM) is a multiple-switch assembly made up of three Normally Open (N/O) and one Normally...
13 March, 2025 Allison 1000 & 2000 Gen 5 Fault Code:P0847 Transmission Pressure Switch 2 (PS2) Circuit – Low CIRCUIT DESCRIPTION:The Pressure Switch Manifold (PSM) is a multiple-switch assembly made up of three Normally Open (N/O) and one Normally...
13 March, 2025 Allison 1000 & 2000 Gen 5 Fault Code:P0848 Transmission Pressure Switch 2 (PS2) Circuit – High CIRCUIT DESCRIPTION:The Pressure Switch Manifold (PSM) is a multiple-switch assembly made up of three Normally Open (N/O) and one Normally...