Automatic Transmission and Traction Codes

Codes for automatic, CVT and dual-clutch transmissions: shift and pressure control solenoids, input and output speed sensors, torque converter clutch, fluid temperature and the selector range sensor.

Many transmissions go into limp mode when they detect a fault: they stay in a fixed gear to protect themselves. Transmission repairs are expensive, so it is always worth starting with the basics: fluid level, fluid condition and electrical connections.

Most searched codes in this system

• P0700: the transmission computer has stored its own code; read it with a scan tool that can access that module.
• P0715 to P0722: input and output speed sensors.
• P0740 to P0744: torque converter clutch.
• P0750 to P0770: shift solenoids.
• P0730: incorrect gear ratio.

What to check first

1. Check the fluid level and condition using the manufacturer's procedure.
2. Read the codes stored in the transmission module too, not just the engine codes.
3. Inspect the transmission connector and harness, which are exposed to oil and heat.
4. Ask whether there is a software update or a technical service bulletin.