Severity: Fix right away. Driving risks expensive damage or a breakdown.
The transmission input speed sensor is sending no signal at all, so the computer cannot tell how fast the input shaft is turning.
Inspect the wiring and connector, clean the sensor, and replace it if there is still no signal.
The transmission will likely go into limp mode. Get it checked right away.
Avoid driving until it is checked — towing is the safer choice. The transmission will likely go into limp mode. Get it checked right away.
The most common causes are: Failed input speed sensor; Damaged wiring; Disconnected connector; Metal debris on the sensor. A scan tool and a visual check of the parts above is where a technician starts.
Inspect the wiring and connector, clean the sensor, and replace it if there is still no signal.
