Fault code P0949 is called “Auto Shift Manual Adaptive Learning Not Complete” but in different programs it may be called differently. This fault designation applies to all vehicles equipped with OBD-II.
Technical description and explained code P0949
This diagnostic trouble code (DTC) is a generic transmission code. Error P0949 is considered a general code because it applies to all makes and models of vehicles. Although the specific repair steps may vary slightly depending on the model.
This code applies to vehicles with automatic transmission. It is set when the adaptation has not been performed correctly or is incomplete.
Adaptation of the automatic transmission (AMT) is necessary for proper operation of the clutch release actuator. If this is not done, transmission malfunctions may occur. Such as jerks, jerks during driving, and increased clutch wear.
Adaptation is usually required after repairs, such as after replacing the clutch. In some cases, adaptation is performed as the clutch is worn to improve performance.
This means that the automatic transmission must be re-learned each time it is serviced or repaired. If the re-learn procedure is not performed or is not performed correctly, code P0949 will be stored.
Symptoms of vehicle malfunctions
The main signal that an error P0949 has occurred is the Malfunction Indicator Lamp (MIL) is also known as the CheckEngine Light.
It can also be warning signs such as:
- The “Check engine” control lamp on the control panel will light up (the code will be stored as a fault).
- The transmission does not shift properly.
- Jerking when shifting or driving.
- There may be no symptoms other than a stored fault code.
Stored fault code P0949 is considered serious, as it can cause handling and safety problems with the vehicle. The conditions that contributed to the stored code should be corrected as soon as possible.
Factors that can cause this error code
The error code P0949 can mean that one or more of the following problems have occurred:
- Transmission has not been adapted.
- Calibration has not been performed correctly.
- Short-circuited or damaged wiring harness in gear shift circuit.
- Faulty wiring harness connector.
- Transmission control module (TCM) may be defective.
How to fix or reset OBD-2 code P0949
Some suggested steps for troubleshooting and fix the error code P0949:
- Read all stored data and error codes with an OBD-II scanner.
- Clear the error codes from the computer memory.
- Test-drive the vehicle to find out if error P0949 appears again.
- Perform transmission adaptation according to the manufacturer’s technical documentation.
- Visually inspect the relevant wires and connectors for damage.
- Replace defective items if necessary.
- Test the transmission control module (TCM).
Diagnose and repair of problems
The first thing to do is to properly adapt the transmission as specified in the manufacturer’s technical documentation. In some cases it is necessary to contact the dealer for this procedure.
Next, when diagnosing code P0949, it is worth checking the electrical part for damage. In today’s vehicles, electrical and electronic signals require good cabling for proper data transmission.
Any faults, such as breaks, disconnected connectors or corrosion, can interrupt signals, leading to transmission control failures. Next, check the battery, as some PCM and TCM modules are sensitive to low voltage.
If the battery is low, the system may detect this as a failure. Make sure the battery is delivering at least 12 volts and that the alternator is running properly, at least 13 volts at idle.
The transmission control module (TCM) fails very rarely, but it can happen. Therefore, when diagnosing error P0949, it should be checked if all other steps have already been completed.
On which vehicles does this problem occur most frequently
Fault code P0949 can occur on different vehicles but there are statistics on which brands this occurs most often. Here is a list of some of them:
- Citroen (C4, Picasso)
- Ford (Fusion, Kuga, Mondeo)
- Peugeot
- Smart
- LADA (Granta, Vesta)
Fault code P0949 can sometimes be found with other errors. The most common are the following: P0950, P0951, P0952, P0953, P0954, P2788.
