What it means
Clutch A cannot leave the disengaged state when engagement is commanded. No torque transfer through this clutch.
At a glance
- Usually lights the check-engine light
- The engine or gearbox may go into limp mode
How it works
Clutch A is supposed to apply when the transmission commands torque transfer through that clutch. The transmission module compares the commanded state with pressure and speed response; this code sets when Clutch A remains disengaged after engagement is requested, so it cannot transfer torque.
Common causes
Most likely first.
- Clutch actuator stuck at low pressure
- Severe hydraulic leak prevents engagement
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
- Save the freeze-frame and transmission data, and note the commanded Clutch A state, pressure, and gear when the fault occurred.
- Check transmission fluid level and condition, since low or degraded fluid can prevent the actuator from building pressure.
- Inspect the transmission case, connectors, and accessible wiring for leaks, damage, or poor connections affecting Clutch A control.
- With a scan tool, compare commanded and actual Clutch A pressure during an engagement command to determine whether pressure remains low.
- If pressure does not rise, test the Clutch A actuator and hydraulic circuit for a stuck actuator or leak according to the manufacturer's procedure.
Common fixes
- Correct low transmission fluid or service fluid that does not meet the manufacturer's requirements.
- Repair a leaking hydraulic line, seal, or connection in the Clutch A circuit.
- Repair or replace a Clutch A actuator stuck at low pressure.
- Repair the Clutch A clutch assembly if it cannot engage after hydraulic pressure is restored.
Can I keep driving?
Do not rely on the vehicle for normal driving; Clutch A may not transmit torque, and the transmission can lose drive or enter limp mode. If the vehicle cannot move reliably or shifts unexpectedly, stop safely and arrange recovery.
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.