Gear Shift Forward Actuator Circuit Range/Performance

Where it lives

For P0921, start at the actuator the description names.

Check these first

• A forward actuator that strokes slower than commanded
• Debris restricting the forward actuator bore
• A worn forward shift linkage
• A TCM driver fault on the forward actuator circuit

What to do next

1. Read gear shift forward actuator command on a scan tool
2. Command the forward actuator and watch response
3. Inspect the forward shift linkage for wear
4. Measure the forward actuator resistance
5. Replace the actuator if the response is off
6. Clear the code and retest

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