C04AF - Understanding DTC C04AF: Common Issues in 2016-2021 Nissan Rogue and Other Models

Quick Answer

C04AF means: C04AF indicates a malfunction in the Adaptive Cruise Control system related to radar sensor input.

Fix: Check and replace faulty components Cost: $500 - $800 Time: 90-180 minutes

Can I drive with C04AF? Immediate attention is recommended to ensure vehicle safety.

Common Questions

What does C04AF mean and how does it affect my car?

C04AF indicates a malfunction in the Adaptive Cruise Control system. This can lead to issues with maintaining speed and distance from other vehicles, putting you at risk for accidents. Immediate attention is needed to ensure your safety.

What are the most common causes of C04AF and how much does it cost to fix?

Common causes include a faulty radar sensor, wiring issues, or software glitches. Repair costs can range from $150 for wiring repairs to $800 for radar sensor replacement, depending on the extent of the problem.

Can I drive my car with C04AF or should I stop immediately?

While you can drive your vehicle, it's not recommended due to potential safety hazards. Erratic acceleration or braking can occur, so addressing the issue promptly is crucial.

How can I diagnose C04AF myself using GeekOBD APP?

Using the GeekOBD APP, you can scan your vehicle to retrieve the C04AF code, view freeze frame data, and monitor real-time sensor readings to help identify the issue.

What vehicles are most commonly affected by C04AF?

This code is frequently found in 2016-2021 Nissan Rogue models, as well as other Nissan vehicles equipped with adaptive cruise control systems. Keep an eye out for recalls or service bulletins related to these models.

How can I prevent C04AF from happening again?

Regularly clean the radar sensor area and check for obstructions. Keep up with routine maintenance and software updates to ensure optimal performance of the adaptive cruise control system.

What is C04AF?

DTC code C04AF indicates an issue with the Adaptive Cruise Control (ACC) system, specifically relating to the radar sensor input or its communication with the vehicle's onboard computer. This trouble code is commonly seen in vehicles equipped with advanced driver assistance systems (ADAS) like the 2016-2021 Nissan Rogue. When the C04AF code is triggered, it means that the system has detected a malfunction in the radar sensor that is crucial for maintaining the desired speed and distance from the vehicle ahead. The adaptive cruise control uses radar to monitor traffic conditions, making it a vital safety feature. If this system fails, it can lead to erratic acceleration or deceleration, potentially putting you at risk on the road. Additionally, the vehicle's check engine light may illuminate, causing concern for drivers. Ignoring this code can lead to further complications, including additional trouble codes being logged and more critical failures in the vehicle's safety systems. Therefore, addressing the C04AF code swiftly is essential for ensuring your vehicle's safety and functionality.

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

Symptoms

Common symptoms when C04AF is present:

  • The check engine light stays on constantly, indicating a malfunction in the adaptive cruise control system.
  • You may notice that the adaptive cruise control fails to maintain speed or distance from other vehicles, leading to erratic acceleration.
  • Fuel economy may decrease by 10-15% as the vehicle struggles to maintain optimal performance without proper radar input.
  • Unexpected braking or acceleration can occur when the system misinterprets the distance to the vehicle in front.
  • In some cases, the radar sensor may show physical damage, such as cracks or misalignment, affecting its performance.

Possible Causes

Most common causes of C04AF (ordered by frequency):

  1. The most common cause of the C04AF code is a faulty radar sensor, with a likelihood of about 60%. This sensor may be obstructed by dirt or debris, affecting its ability to read distance accurately.
  2. Another cause could be wiring issues, such as damaged connectors or frayed wires that disrupt communication between the radar and the vehicle's computer system.
  3. A third possibility is a software glitch in the vehicle's ECU, which may require a simple update or reset to resolve.
  4. Less common but serious issues include physical damage to the radar sensor assembly, which may require complete replacement.
  5. A rare cause could be interference from aftermarket accessories that affect the radar's ability to function properly.

C04AF Repair Costs

Cost Breakdown by Repair Type

Radar Sensor Replacement

Replacing a faulty radar sensor in the adaptive cruise control system.

  • Total: $500 - $800
  • Success rate: 90%
Wiring Repair

Repairing or replacing damaged wiring in the adaptive cruise control system.

  • Total: $150 - $300
  • Success rate: 85%
Money-Saving Tips for C04AF
  • 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 C04AF Diagnosis Process

Follow these systematic steps to accurately diagnose C04AF. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion, which can take about 5-10 minutes

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion, which can take about 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 - Retrieve all codes and freeze frame data to understand the fault context

Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context. This step usually takes 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 - Use a multimeter or specific diagnostic tools to test the radar sensor and related components, which can take around 20-30 minutes

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the radar sensor and related components, which can take around 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 repairs, verify the proper operation of the adaptive cruise control system and clear codes, taking about 10-15 minutes

Step 4: System function test - After repairs, verify the proper operation of the adaptive cruise control system and clear codes, taking about 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 confirm repair success, which should take approximately 15-20 minutes

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success, which should take approximately 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: Nissan Rogue Adaptive Cruise Control Failure

Vehicle: 2018 Nissan Rogue, 45,000 miles

Problem: Customer reported that the adaptive cruise control was not functioning properly and the check engine light was on.

Diagnosis: After scanning with the GeekOBD APP, the C04AF code was retrieved. Visual inspection revealed a damaged radar sensor.

Solution: Replaced the radar sensor and performed a system reset. Cleared the codes and verified function.

Cost: $650 (Sensor: $500, Labor: $150)

Result: The adaptive cruise control functioned correctly post-repair, and the customer reported improved vehicle performance.

Case Study 2: Wiring Issues in a 2019 Nissan Altima

Vehicle: 2019 Nissan Altima, 30,000 miles

Problem: Customer experienced inconsistent performance of the adaptive cruise control with the C04AF code illuminated.

Diagnosis: Diagnostic testing revealed frayed wiring connected to the radar sensor, which was causing intermittent signals.

Solution: Repaired the wiring harness and ensured all connections were secure. Ran a full system check.

Cost: $250 (Labor: $100, Parts: $150)

Result: Post-repair, the adaptive cruise control functioned smoothly without any further issues.

Diagnose C04AF

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
Download GeekOBD APP Get MOBD Adapter

Code Information

Code: C04AF
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes