OBD-II Error Code P2783: How to Fix Transmission Output Speed Sensor B Intermittent Signal

Q: What does P2783 mean?

P2783 indicates the transmission control module detects an intermittent signal from output speed sensor B. This sensor monitors the transmission output shaft speed for gear shifting and torque converter lockup.

Q: Can I drive with code P2783?

You may drive short distances, but the vehicle may enter limp mode with reduced performance. Continued driving can cause transmission damage.

Q: How much does it cost to fix P2783?

DIY fix costs $20-$100 for a new sensor. Professional repair including labor can range $150-$400, more if internal damage is found.

Q: What causes P2783?

Common causes include faulty output speed sensor, damaged wiring or connector, low transmission fluid, contaminated fluid, or internal transmission failure.

Q: Where is the output speed sensor B located?

It is typically mounted on the transmission case, near the output shaft or tailhousing. Exact location varies by vehicle make and model.

Abstract

Error code P2783 means the transmission control module detects an intermittent or erratic signal from the output speed sensor B. This can cause harsh shifting, limp mode, and check engine light. It is typically caused by a faulty sensor, wiring issues, or low transmission fluid.