Limp mode is not a fault itself — it’s a protection strategy triggered when the ECU detects unreliable data.

Triggers include:

• Airflow mismatches

• Boost control deviations

• Exhaust restriction logic

• Torque monitoring errors

Once limp mode becomes repeatable, it usually means the ECU’s calculated models no longer match physical reality.

Correct solutions involve:

• Live data analysis

• Identifying the limiting strategy

• Correcting ECU logic through calibration

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