The vehicle entered reduced-power mode only on a long grade with trailer load, not during an unloaded road test.
Why this matters
The value of this case is the order of evidence and the verification step. The same symptom on another vehicle may have a different cause.
Evidence to capture first
- Trailer and vehicle weight context
- Freeze-frame load and temperature
- Fuel or boost command versus response
- Cooling and transmission temperature
A disciplined path
- Recreate safely within ratings
- Log a focused data set
- Identify which response reached its control limit first
- Correct and verify under an equivalent controlled load
Decision point
The repair decision followed the first failed response, not the long list of secondary protection codes.
Source desk
Use current model-specific service information for specifications, connector locations, disabling procedures, and tightening values. The following public resources support the broader safety or system context used in this guide.
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