P0901

Clutch A Actuator Control Circuit Range/Performance

Transmission / clutch actuator Generic OBD-II Medium

What it means

P0901 means the clutch 'A' actuator control circuit is not performing as expected on a vehicle with an automated-manual or clutch-by-wire transmission. The actuator engages and releases the clutch electronically; when its circuit reads out of range the transmission may shift roughly, slip, or fall back to a protective limp mode.

Medium

Can I keep driving? Engine starts, but on an automated-manual or dual-clutch transmission the car may shift harshly, hesitate, or drop into limp mode and refuse to move — repair before it strands you.

Real-world scan data

Seen in

511

scans in the past year

Found in

0.1%

of scans

0.1%

of scans that found faults

Appears alongside · share of P0901 scans

P0914in 61.2% of scans

P0226in 48.9% of scans

P0657in 47.5% of scans

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Check-engine or transmission warning light on
Difficulty or failure to shift gears
Harsh or jerky shifting
Clutch slipping or failing to fully engage
Transmission enters limp mode / limited functionality

Common causes

Most likely first

Faulty clutch actuator or its position sensorLikely
Wiring or connector fault in the actuator control circuitCommon
Mechanical or hydraulic problem in the clutch systemCommon
Low system voltage, or a faulty clutch control moduleLess often

How to diagnose & fix

Work through it in order

Read freeze-frame data and confirm battery/system voltage is within spec.
Inspect the actuator connector and wiring for damage, corrosion, or loose pins.
Test the actuator and its position sensor against specification.
Check the clutch hydraulics/mechanicals; replace the actuator or module as diagnosed, then clear and re-test.

FAQ

Quick answers

Is it safe to drive with P0901?+

Not reliably. The car may refuse to move or enter limp mode without warning, so repair it before depending on the vehicle.

Can I just clear P0901?+

It clears, but returns as soon as the actuator fault reappears. Fix the actuator or its circuit first.

Read & clear P0901 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX