What it means
Voltage on shift fork E position sensor signal line is above the expected window. Wire shorted to B+ or sensor open.
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, while its position sensor tells the transmission control module where the fork is. This code sets when the sensor signal rises above the expected range, such as when the signal wire contacts battery voltage or the sensor circuit is open.
Common causes
Most likely first.
- Signal wire shorted to B+
- Open position sensor
- 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 fork E position and sensor voltage to confirm the signal is high when the module expects a valid position reading.
- Inspect the sensor connector and harness for corrosion, loose terminals, damaged insulation, or wiring contacting a power feed.
- Check that the connector is seated and terminals are secure; an open sensor connection can leave the signal high.
- Using the wiring diagram, test the signal wire for a short to battery voltage and check for an open circuit, comparing results with the manufacturer's specification.
- If the harness checks out, test the fork E sensor and its reference and ground circuits using the manufacturer's procedure.
Common fixes
- Reconnect the sensor plug and clean or repair corroded terminals.
- Repair an open or damaged wire in the shift fork E sensor circuit.
- Repair wiring that has shorted the signal line to battery voltage.
- Replace the fork E position sensor if it is open or fails its specified test.
Can I keep driving?
Keep driving to a minimum because an invalid high fork E signal can cause harsh or missing shifts and may trigger limp mode. If gear selection becomes unreliable or the transmission slips, stop and arrange recovery to limit the risk of 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.