Allison 3000 & 4000 Gen 4 Fault Code: P1739 Incorrect Low Gear Ratio
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Allison 3000 & 4000 Gen 4 Fault Code: P1891 Throttle Position Sensor (TPS) PWM Signal Low Input
Allison 3000 & 4000 Gen 4 Fault Code: P1892 Throttle Position Sensor (TPS) PWM Signal High Input
Allison 3000 & 4000 Gen 4 Fault Code: P2184 Engine Coolant Temperature Sensor Circuit Low Input
Allison 3000 & 4000 Gen 4 Fault Code: P2185 Engine Coolant Temperature Sensor Circuit High Input
Allison 3000 & 4000 Gen 4 Fault Code: P2637 Torque Management Feedback Signal - SEM
Allison 3000 & 4000 Gen 4 Fault Code: P2641 Torque Management Feedback Signal - LRTP
Allison 3000 & 4000 Gen 4 Fault Code: P2669 Actuator Supply Voltage 2 (HSD2) Open
Allison 3000 & 4000 Gen 4 Fault Code: P2670 Actuator Supply Voltage 2 (HSD2) Low
Allison 3000 & 4000 Gen 4 Fault Code: P2671 Actuator Supply Voltage 2 (HSD2) High