What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P0901Clutch Actuator Circuit Range/PerformanceP0901-00Clutch 1 Actuator Control Circuit Range PerformanceManufacturer communications
3Original wording in English
FIAT
Reported code forms P0901
Flash: Transmission Diagnostic and Shift Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. Customers may experience a (MIL) illumination. Upon…
FIAT
Reported code forms P0901
Flash: Transmission Diagnostic and Shift Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. Customers may experience a (MIL) illumination. Upon…
CHRYSLER, FIAT, JEEP, RAM
Reported code forms P0901-00
Transmission Shift And Drivability Enhancements For P0901-00. This bulletin involves performing transmission harness replacement per S55 recall.Both the PCM and TCM must be up to date for these changes to be effective…
Check vehicle applicability
2A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.