What it means
Voltage on shift fork E position sensor signal line is below the expected window. Wire shorted to ground or sensor short.
At a glance
- Usually lights the check-engine light
- The engine or gearbox may go into limp mode
How it works
Shift fork E moves the transmission’s gear-engagement mechanism, and its position sensor reports where the fork is to the transmission control module. This code sets when the sensor signal falls below the expected range, which can happen if the signal wire is grounded or the sensor is internally shorted.
Common causes
Most likely first.
- Signal wire shorted to ground
- Internal sensor short
- Connector pins corroded - high contact resistance
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
How to diagnose it
- Record freeze-frame data and check live shift fork E position and sensor voltage to see whether the signal stays low or changes with commanded movement.
- Inspect the fork E sensor connector and nearby harness for corrosion, damaged insulation, pinched wiring, or a signal wire touching ground.
- Check that the sensor connector is fully seated and its terminals make sound contact; corrosion can disrupt the signal.
- With the correct wiring diagram, test the signal wire for a short to ground and check the sensor reference and ground circuits against the manufacturer's specification.
- If wiring and connections pass, test the fork E position sensor and compare its output with commanded fork movement using the manufacturer's procedure.
Common fixes
- Clean corroded terminals and secure the sensor connector.
- Repair damaged wiring or insulation where the fork E signal wire is shorted to ground.
- Replace a faulty shift fork E position sensor if its output fails the specified test.
- Repair the fork actuator or transmission mechanism if the sensor and wiring are sound but fork movement is incorrect.
Can I keep driving?
Avoid hard acceleration and unnecessary trips; a low fork E position signal can cause missed or harsh shifts and may put the transmission in limp mode. If the vehicle cannot select gears reliably or slips, stop driving and arrange recovery to avoid further transmission damage.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.