Transmission Adaptive Shift Strategy Malfunction

What this code means

The transmission adaptive shift learning system has detected conflicting or unreliable data, preventing it from properly adapting shift points and quality.

Symptoms

• Check Engine Light
• Inconsistent shift quality
• Shifts seem random in timing
• Transmission hunting between gears
• Shift firmness varies unpredictably
• Fuel economy fluctuating

Common causes

• TCM memory corruption
• Conflicting sensor inputs
• Throttle position sensor drift
• Vehicle speed sensor noise
• Recent battery disconnect without relearn

Diagnostic steps

1. Read adaptive shift tables in TCM
2. Reset transmission adaptive learning
3. Monitor shift quality parameters
4. Check throttle and speed sensor accuracy
5. Perform transmission relearn drive cycle

Repair notes

Reset adaptive learning and perform drive cycle relearn. If the issue returns, investigate sensor accuracy. TCM replacement if memory is corrupted.

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