P0927
Gear Shift Reverse Actuator Circuit High
Transmission / shift actuator
Generic OBD-II
Medium
What it means
P0927 means the controller sees an abnormally high voltage on the gear shift reverse actuator circuit — the actuator that engages reverse on an automated/robotized transmission. The engine starts and runs and forward gears usually work, but engaging reverse may be difficult or impossible until the actuator or its wiring is repaired.
Medium
Can I keep driving? The engine runs and forward gears usually work, but reverse may be difficult or unavailable — have it checked soon.
Common symptoms
What you'll notice
- Check-engine light on
- Difficulty engaging reverse gear
- Reverse won't engage at all
- Harsh or delayed shifts into reverse
Common causes
Most likely first
- Faulty gear shift reverse actuatorLikely
- Open or short-to-power in the actuator circuitCommon
- Loose or corroded connector at the actuatorCommon
- Failed transmission control module (rare — check wiring first)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and confirm the fault occurs when selecting reverse.
- Inspect the reverse actuator connector and wiring for opens, shorts-to-power, or corrosion.
- Test the actuator's resistance and command it with a scan tool to confirm operation.
- Repair wiring/connector faults, then replace the reverse actuator if it fails to operate. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0927?+
Forward driving is generally fine, but you may not be able to reverse. Get it fixed so you don't get stranded where you need to back up.
Can I just clear P0927?+
It returns until the actuator or its circuit is repaired. Clearing only resets the light.
Related codes
Often seen with P0927
Read & clear P0927 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX