Transmission Adaptive Values Not Learned
The TCM has not learned the adaptive shift values needed for refined gear changes. The transmission operates with default values until adaptation completes.
Affected components
- Tcm
Common causes
- High likelihood: Adaptation lost after battery disconnect or TCM reset
- Medium likelihood: Following major transmission repair
Possible symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Diagnostic notes
- The malfunction indicator lamp may illuminate
- A drive cycle may be required after repair
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.