P0923: Gear Shift Forward Actuator Circuit High
What to do
Expect a set of gears to become unavailable. Ask for the actuator winding to be measured rather than the part replaced on the code alone.
What this code means
The forward shift actuator circuit reads above its valid range — an open circuit or a short to supply. An open winding and a broken wire are indistinguishable at the module, and measuring the winding directly separates them.
Likely causes
Start here
- Open circuit in actuator wiring · moderate
- Faulty gear shift actuator · specialist
- Corroded transmission connector · moderate
Less common
- Wiring shorted to voltage · moderate
Symptoms
Components involved
Information, not instruction
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Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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