P0926
Gear Shift Reverse Actuator Circuit Low
Transmission
Generic OBD-II
Medium
What it means
P0926 means the control circuit for the gear shift reverse actuator — the device that engages reverse on an automated/clutchless transmission — is reading abnormally low voltage. The engine still starts and the car drives forward, but reverse may be hard to engage or unavailable. It usually points to a faulty actuator, wiring shorted-to-ground, or a poor connection.
Medium
Can I keep driving? The car drives forward, but you may lose reverse gear; fix it before you're stranded somewhere that needs backing up.
Common symptoms
What you'll notice
- Check-engine light on
- Difficulty engaging reverse, or no reverse at all
- Harsh or delayed shifts into reverse
- Reduced overall shift performance
Common causes
Most likely first
- Faulty gear shift reverse actuatorLikely
- Open or short-to-ground in the actuator wiringCommon
- Loose or corroded connector in the circuitCommon
- Low supply voltage to the actuatorLess often
- Faulty transmission control module (TCM)Less often
How to diagnose & fix
Work through it in order
- Inspect the reverse actuator connector and wiring for damage, corrosion, or a short.
- Measure the actuator's resistance and supply voltage against spec.
- Confirm the control circuit isn't shorted-to-ground, which would pull the signal low.
- Replace the reverse actuator if it fails testing.
- Address the TCM only after wiring and actuator causes are ruled out. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0926?+
Forward driving is generally fine, but losing reverse is a real risk, so have it fixed before it strands you.
Can I just clear P0926?+
It returns until the actuator, its wiring, or the connector is repaired.
Related codes
Often seen with P0926
Read & clear P0926 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