Quick Answer

C0F86 means: C0F86 indicates a problem with the radar sensor system related to adaptive cruise control.

Fix: Check and replace faulty components Cost: $50 - $100 Time: 90-180 minutes

Can I drive with C0F86? You should address this issue immediately to ensure safe vehicle operation.

Common Questions

What does C0F86 mean and how does it affect my car?

C0F86 means there's a problem with your vehicle's radar sensor used for adaptive cruise control. It can lead to unreliable speed adjustments and safety risks if not addressed promptly.

What are the most common causes of C0F86 and how much does it cost to fix?

The most common cause is obstruction of the radar sensor, which can often be fixed with a simple cleaning costing around $50. If the sensor is faulty, replacement costs can range from $300 to $600.

Can I drive my car with C0F86 or should I stop immediately?

While you can drive your car, it's advisable to address the C0F86 code as soon as possible to avoid potential safety issues with adaptive cruise control.

How can I diagnose C0F86 myself using GeekOBD APP?

Use the GeekOBD APP to scan for trouble codes. Once C0F86 is identified, check the radar sensor for obstructions and clear any codes after cleaning or repairs.

What vehicles are most commonly affected by C0F86?

C0F86 is frequently seen in 2015-2018 Ford F-150 models, especially those equipped with adaptive cruise control features.

How can I prevent C0F86 from happening again?

Regularly inspect and clean the radar sensor area, especially after inclement weather, to prevent obstructions that can trigger the C0F86 code.

What is C0F86?

The diagnostic trouble code (DTC) C0F86 indicates a fault within the vehicle's advanced driver assistance systems (ADAS), particularly related to the radar sensor responsible for adaptive cruise control functionality. This code typically arises in 2015-2018 Ford F-150 models, where the radar sensor may be obstructed, malfunctioning, or improperly calibrated. The radar sensor plays a crucial role in detecting vehicles ahead and adjusting the speed accordingly to maintain a safe distance. When the C0F86 code is triggered, you may notice that the adaptive cruise control feature becomes unreliable or ceases to function altogether. Owners might experience frustration when they attempt to use this feature, as it can lead to unexpected acceleration or deceleration and potentially compromise safety. It's important for vehicle owners to address this code promptly, as ignoring it can lead to more severe issues or even safety hazards on the road. Additionally, other systems that rely on the radar sensor for functionality, such as collision warning systems, may also be affected, leading to a decrease in the overall safety and driving experience of the vehicle.

System: C - Chassis (ABS, Steering, Suspension)

Symptoms

Common symptoms when C0F86 is present:

  • The adaptive cruise control light on the dashboard may illuminate, indicating a malfunction.
  • You might notice that the vehicle fails to maintain a set speed, resulting in erratic acceleration or deceleration.
  • The check engine light could also be illuminated alongside the C0F86 code, indicating additional issues in the vehicle's system.
  • You may experience inconsistent braking or acceleration when attempting to use adaptive cruise control.
  • The radar sensor may show physical obstructions or dirt, leading to decreased performance.

Possible Causes

Most common causes of C0F86 (ordered by frequency):

  1. {'cause': "Obstruction of the radar sensor (70%) - This is the most common cause, where dirt, snow, or other debris block the sensor's view.", 'details': 'Regular cleaning of the radar sensor area can help prevent this issue.'}
  2. {'cause': "Faulty radar sensor (20%) - A malfunctioning sensor can send incorrect signals to the vehicle's computer.", 'details': 'Testing and replacement of the radar sensor may be required if cleaning does not resolve the issue.'}
  3. {'cause': 'Incorrect calibration (5%) - If the radar sensor has been replaced, it may need proper calibration to function correctly.', 'details': 'Utilizing specialized diagnostic tools can help ensure correct calibration.'}
  4. {'cause': "Wiring issues (3%) - Damaged or corroded wiring can interrupt the radar sensor's connection to the vehicle's computer.", 'details': 'Visual inspection and repair of wiring may be necessary.'}
  5. {'cause': 'Software glitches (2%) - Occasionally, software updates may be needed to resolve communication issues.', 'details': 'Consulting the manufacturer for potential updates is recommended.'}

C0F86 Repair Costs

Cost Breakdown by Repair Type

Radar Sensor Cleaning

Simple cleaning of the radar sensor surface to remove any obstructions.

  • Total: $50 - $100
  • Success rate: 80%
Radar Sensor Replacement

Replacing a faulty radar sensor with a new, OEM-quality part.

  • Total: $300 - $600
  • Success rate: 95%
Calibration Service

Professional recalibration of the radar sensor after replacement.

  • Total: $100 - $200
  • Success rate: 90%
Money-Saving Tips for C0F86
  • Start with the most common and least expensive repairs first
  • Use GeekOBD APP to confirm diagnosis before replacing expensive parts
  • Consider preventive maintenance to avoid future occurrences
  • Compare prices for OEM vs aftermarket parts based on your needs
  • Address the issue promptly to prevent more expensive secondary damage

Diagnostic Steps

Professional C0F86 Diagnosis Process

Follow these systematic steps to accurately diagnose C0F86. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Check for any visible obstructions on the radar sensor located in the front grille and ensure wiring is intact (5-10 minutes)

Step 1: Initial visual inspection - Check for any visible obstructions on the radar sensor located in the front grille and ensure wiring is intact (5-10 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 2: Step 2: OBD2 scan with GeekOBD APP - Use the GeekOBD APP to retrieve C0F86 and any other related codes to understand the fault context (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Use the GeekOBD APP to retrieve C0F86 and any other related codes to understand the fault context (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Step 3: Component testing - Utilize a multimeter to test the radar sensor and wiring, checking for continuity and proper voltage (20-30 minutes)

Step 3: Component testing - Utilize a multimeter to test the radar sensor and wiring, checking for continuity and proper voltage (20-30 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: Step 4: System function test - After cleaning or replacing components, verify proper operation of the adaptive cruise control system and clear any codes (10-15 minutes)

Step 4: System function test - After cleaning or replacing components, verify proper operation of the adaptive cruise control system and clear any codes (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to ensure the adaptive cruise control functions correctly without triggering the C0F86 code again (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to ensure the adaptive cruise control functions correctly without triggering the C0F86 code again (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

Important Notes

  • Always verify the repair with GeekOBD APP after completing diagnostic steps
  • Clear codes and test drive to ensure the problem is resolved
  • Address underlying causes to prevent code recurrence

Real Repair Case Studies

Case Study 1: Radar Sensor Replacement on 2017 Ford F-150

Vehicle: 2017 Ford F-150, 45,000 miles

Problem: Customer reported that the adaptive cruise control was not functioning.

Diagnosis: Diagnostics revealed a C0F86 code. Visual inspection showed dirt on the radar sensor.

Solution: Cleaned the radar sensor and recalibrated it, resolving the issue.

Cost: $150 (cleaning + calibration)

Result: The adaptive cruise control functioned normally after the repair.

Case Study 2: Faulty Radar Sensor in 2016 Ford F-150

Vehicle: 2016 Ford F-150, 60,000 miles

Problem: Customer experienced erratic adaptive cruise control behavior.

Diagnosis: C0F86 code confirmed. Radar sensor was tested and found faulty.

Solution: Replaced the radar sensor and performed a calibration.

Cost: $550 (sensor + calibration)

Result: The adaptive cruise control worked flawlessly post-repair.

Diagnose C0F86

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis

Code Information

Code: C0F86
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes