P0920high severityPowertrain
Gear Shift Forward Actuator Circuit/Open
on 1994-2007 Dodge Ram 2500 5.9L I6 Cummins Diesel · 4WD
What this code means
The forward gear shift actuator circuit is open or not responding. This affects the transmission's ability to move into forward gears.
Symptoms
- Fails to engage forward gears
- Harsh or no forward shifts
- Transmission warning light
Common causes
- Open forward shift actuator circuit
- Failed forward shift actuator
- Corroded connector or broken wire
- Faulty transmission control module
Diagnostic steps
- Retrieve stored transmission codes
- Inspect forward actuator wiring for opens
- Measure actuator resistance
- Replace actuator or repair circuit
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