What Does P2591 Mean?
The left front distance range sensor for adaptive cruise control is malfunctioning or providing invalid data. This sensor monitors the distance and closing rate to vehicles ahead for cruise control operation.
Common Causes
35%
Sensor lens obstruction from dirt, snow, ice, or debris
25%
Misaligned or damaged left front distance sensor after collision or repair
20%
Faulty left front radar or ultrasonic distance sensor
15%
Water intrusion or corrosion in sensor connector
5%
Cruise control module communication fault or software issue
Diagnostic Steps
1
Step 1: Visually inspect and clean left front sensor lens and surrounding area - remove any obstructions or buildup
2
Step 2: Verify sensor is properly mounted and aligned according to manufacturer specifications using alignment tool
3
Step 3: Check sensor connector for moisture, corrosion, or damaged pins and test circuit continuity
4
Step 4: Perform sensor self-test or calibration procedure using factory scan tool
5
Step 5: Compare live data readings from left and right sensors under identical conditions to identify discrepancies
Estimated Repair Cost
$100 - $1,200
Parts + labor, varies by vehicle and location
The left front distance range sensor for adaptive cruise control is malfunctioning or providing invalid data. This sensor monitors the distance and closing rate to vehicles ahead for cruise control operation.
The most common cause of P2591 (Cruise Control Front Distance Range Sensor Left) is: Sensor lens obstruction from dirt, snow, ice, or debris
Typical repair costs for P2591 range from $100 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Adaptive cruise control and collision warning features will be disabled or degraded. Standard cruise control may still function, but driver must maintain full attention to traffic ahead.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2591 to identify the root cause.
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Quick Info
Category
Powertrain
System
Adaptive Cruise Control / Driver Assistance
Difficulty
Type
Generic (SAE)
Recommended Tools
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