P0924
Gear Shift Reverse Actuator Circuit/Open
Automated shift actuator
Generic OBD-II
Medium
What it means
P0924 means the module detected a circuit fault or open in the gear shift reverse actuator — the actuator that engages reverse on an automated-manual transmission. The engine starts and the car drives forward, but the main symptom is trouble engaging or losing reverse gear, and the transmission may fall back to a limited mode. An open or damaged circuit at the actuator is the typical cause.
Medium
Can I keep driving? The car starts and drives forward, but you may not be able to engage reverse — get it fixed before it leaves you unable to back up.
Common symptoms
What you'll notice
- Check-engine light on
- Difficulty engaging reverse gear
- Inability to shift into reverse
- Harsh or delayed reverse engagement
- Transmission may enter limp/limited mode
Common causes
Most likely first
- Open or damaged wiring in the reverse actuator circuitLikely
- Loose or corroded connector at the actuatorCommon
- Faulty gear shift reverse actuatorCommon
- Mechanical problem in the shift mechanismLess often
- Faulty transmission control module (rare)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and confirm the fault is on the reverse actuator circuit.
- Inspect the actuator connector and wiring for an open, chafe, or corrosion.
- Measure the actuator's resistance and check for continuity against spec.
- Check the shift mechanism for binding that could stop reverse engagement.
- Replace the reverse actuator if it's open or failed, then clear and re-test reverse.
FAQ
Quick answers
Is it safe to drive with P0924?+
Forward driving is usually unaffected, but you may lose reverse. It's safe to move the car short-term, but plan to repair it before you need to back up.
Can I just clear P0924?+
An open circuit will set the code again. Trace the wiring and test the actuator rather than just clearing it.
Related codes
Often seen with P0924
Read & clear P0924 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