P0921
Gear Shift Forward Actuator Circuit Range/Performance
P0921 is an OBD-II diagnostic trouble code meaning: Gear Shift Forward Actuator Circuit Range/Performance. Common causes: open or short circuit in the actuator circuit, shift actuator malfunction. Estimated repair cost: $33–167.
Symptoms
- Gear shifting problems
- Check Engine light comes on
- Switching to emergency mode of the gearbox
- Jerks when shifting gears
- Unclear gear shifting
Causes
- Open or short circuit in the actuator circuit
- Shift actuator malfunction
- Poor contact in connectors
- Transmission control module (TCM) problems
- Mechanical damage in the gear shift system
How to Fix
- Check the integrity of the wiring and connectors of the actuator
- Measure the resistance and voltage in the actuator circuit
- Check the mechanical part of the gear shift system
- If necessary, replace the gear shift actuator
- Check and, if necessary, replace the transmission control unit
Related codes
Error P0921 by Vehicle Brand
FAQ
What does the P0921 code mean?
P0921 is an OBD-II diagnostic trouble code that indicates: Gear Shift Forward Actuator Circuit Range/Performance
What causes a P0921 error code?
The most common causes of P0921 include: Open or short circuit in the actuator circuit; Shift actuator malfunction; Poor contact in connectors; Transmission control module (TCM) problems.
How do I fix a P0921 diagnostic trouble code?
To fix P0921: Check the integrity of the wiring and connectors of the actuator. Measure the resistance and voltage in the actuator circuit. Check the mechanical part of the gear shift system. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0921?
Limited driving only, diagnose soon
How much does it cost to fix P0921?
The estimated repair cost for P0921 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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