P0920
PowertrainTransmission Shifthigh severityGear Shift Forward Actuator Circuit/Open
What P0920 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
🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Budget handheld~$40
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
✓ ANCEL official store
Serious DIY~$100
BlueDriver Pro →
Enhanced codes (ABS, airbag, TPMS) plus repair reports.
SHOP FAVORITEShop-grade tablet~$300
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
✓ Autel official store
Pro diagnostics$1,500+
Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
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