Code Definition

P0949 — ASM Adaptive Learning Not Done

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0949

P0949 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0949 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The P0949 fault code is set when the control module identifies that the Adaptive Shift Control (ASM) learning process has not been completed. ASM is a system used in automatic transmissions to optimise shift patterns based on driving habits and conditions. This fault code suggests that the transmission's control module has not been able to successfully complete the adaptive learning process, which is essential for calibrating the transmission to the vehicle's specific driving conditions. The failure to complete this process can be due to various reasons, such as interruptions in the learning c...

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