P0901: Clutch A Actuator Control Circuit Range/Performance

What does P0901 mean?

Set when the clutch A actuator circuit is electrically present but does not behave as expected, for instance when the measured current or response deviates too far from the target. Usage differs by maker. Ford lists P0901 among the DPS6 PowerShift codes, and trade guidance recommends swapping the two identical clutch motors: if the fault moves to clutch B, the motor is bad. Honda added P0901 on the 2015 TLX V6 nine-speed automatic for abnormal resistance in the clutch pressure control solenoid circuits, with failsafe gear hold and MIL. FCA recall 16V529 on 9-speed models also uses it to decide on a harness replacement. P0900, P0902 and P0903 are the pure circuit faults; P090B is the clutch B counterpart.

The code tells you which monitor failed, not which part is broken. Test before replacing parts.

Symptoms

• Check engine light on
• Shudder, harsh engagement or missed shifts
• Failsafe mode with a held gear

Common causes

• High Weak or worn clutch A actuator motor (dual-clutch units)
• Medium High resistance in the transmission harness or sub-harness
• Low TCM fault or outdated TCM software

Likelihood is a general estimate across vehicles; your make and model may differ.