P2591: Cruise Control Front Distance Range Sensor Left
Standardized SAE J2012 code · P25xx — Auxiliary inputs
What does P2591 mean?
General fault on the left-side front distance-range sensor used by adaptive cruise. Multi-sensor radar arrays use left/center/right sensors for wider field-of-view and lane discrimination — without left, ACC may degrade to single-target tracking.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High Dirty sensor surface
- Medium Sensor misaligned after a frontal impact
Likelihood is a general estimate across vehicles; your make and model may differ.
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P2591 in the community
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