Quick Answer
C0801 means: C0801 indicates a malfunction with the steering angle sensor, crucial for stability control.
Can I drive with C0801? Immediate attention is advised due to potential safety risks.
Common Questions
What does C0801 mean and how does it affect my car?
C0801 indicates a malfunction with the steering angle sensor, which is vital for systems like traction control and stability control. If this sensor fails, you may experience steering difficulties and reduced vehicle stability, posing safety risks.
What are the most common causes of C0801 and how much does it cost to fix?
The most common causes include a faulty steering angle sensor, damaged wiring, or improper wheel alignment. Repair costs can range from $150 for sensor replacement to $50 for wiring repairs, depending on the severity of the issue.
Can I drive my car with C0801 or should I stop immediately?
It's not advisable to drive with the C0801 code active, as it can affect your vehicle's handling and safety features. Ignoring this warning may lead to further damage and safety hazards.
How can I diagnose C0801 myself using GeekOBD APP?
To diagnose C0801, use the GeekOBD APP to scan for codes and view freeze frame data. Check the steering angle sensor readings and verify its output; if it’s outside the expected range, the sensor may need replacing.
What vehicles are most commonly affected by C0801?
C0801 is commonly found in models like the 2015-2020 Ford Fusion, 2016-2019 Chevrolet Malibu, and 2017-2021 Honda CR-V. Check for any recalls or technical service bulletins regarding steering issues for these models.
How can I prevent C0801 from happening again?
Regular vehicle maintenance is key. Ensure wheel alignments are performed after any suspension work, and inspect wiring connections during routine checks to prevent corrosion and damage.
What is C0801?
The Diagnostic Trouble Code (DTC) C0801 indicates a malfunction related to the steering angle sensor, which is a critical component in modern vehicles that helps with stability control and steering assist systems. This code is commonly found in various makes and models, especially those manufactured by Ford, Chevrolet, and Honda between 2015 and 2020. When this code is triggered, it typically means that the vehicle's onboard diagnostics have detected a discrepancy with the steering angle sensor's voltage or signal output. This can lead to several real-world implications, such as reduced steering responsiveness, potential issues with electronic stability control, and could even affect the vehicle's traction control system. Drivers might notice symptoms including an illuminated warning light on the dashboard, erratic steering behavior, or even a loss of power steering in certain situations. Ignoring this code can lead to further complications, including safety risks while driving, as the stability control systems may not function as intended. If you encounter the C0801 code, it's crucial to address the issue promptly, as it can impact your vehicle's handling and safety features.
System: C - Chassis (ABS, Steering, Suspension)
Symptoms
Common symptoms when C0801 is present:
- The check engine light remains illuminated, indicating a fault detected by the onboard diagnostics.
- Steering feels unresponsive or abnormal, making it difficult to control the vehicle, especially during turns or sudden maneuvers.
- There may be a noticeable decrease in fuel efficiency due to the vehicle’s stability control systems working harder to compensate for the sensor malfunction.
- Drivers may experience warning messages on the dashboard related to steering or stability control.
- Intermittent loss of power steering assistance, particularly when maneuvering at low speeds.
Possible Causes
Most common causes of C0801 (ordered by frequency):
- The most common cause of C0801 is a faulty steering angle sensor, which accounts for about 60% of cases. This sensor may fail due to wear and tear, electrical issues, or physical damage.
- Another potential cause is corroded or damaged wiring and connectors leading to the sensor. This issue often arises from exposure to moisture or road debris, affecting approximately 25% of cases.
- Improper wheel alignment can also trigger the C0801 code, particularly if the vehicle has been involved in a collision or sustained other forms of impact. Regular maintenance can help prevent this issue.
- Less common but serious causes can include issues with the electronic control unit (ECU) that interprets signals from the sensor, which may require professional diagnostics.
- A rare cause could be software glitches or outdated firmware in the vehicle’s onboard systems, which may necessitate a software update from the dealership.
C0801 Repair Costs
Cost Breakdown by Repair Type
Steering Angle Sensor Replacement
Replacing the faulty steering angle sensor with a new OEM part ensures precise readings and restores functionality.
- Total: $150 - $400
- Success rate: 95%
Wiring Repair or Replacement
Fixing corroded or damaged wiring can resolve the issue if the sensor is functioning correctly.
- Total: $50 - $200
- Success rate: 80%
Money-Saving Tips for C0801
- 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 C0801 Diagnosis Process
Follow these systematic steps to accurately diagnose C0801. 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 affecting the steering angle sensor (5-10 minutes)
Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion affecting the steering angle sensor (5-10 minutes).
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context, which helps in diagnosing the issue accurately (10-15 minutes)
Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context, which helps in diagnosing the issue accurately (10-15 minutes).
Step 3: Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the steering angle sensor's output and check for proper voltage and signal (20-30 minutes)
Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the steering angle sensor's output and check for proper voltage and signal (20-30 minutes).
Step 4: Step 4: System function test - After addressing any issues, verify proper operation of the sensor and clear codes to see if they reappear (10-15 minutes)
Step 4: System function test - After addressing any issues, verify proper operation of the sensor and clear codes to see if they reappear (10-15 minutes).
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure the steering systems function correctly (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure the steering systems function correctly (15-20 minutes).
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: Steering Angle Sensor Replacement on 2018 Ford Fusion
Vehicle: 2018 Ford Fusion, 35,000 miles
Problem: Customer reported the check engine light was on and the steering felt loose and unresponsive.
Diagnosis: After scanning with the GeekOBD APP, C0801 was confirmed. A visual inspection showed damaged wiring near the steering column.
Solution: Replaced the steering angle sensor and repaired the damaged wiring. Cleared the codes and verified proper function.
Cost: $250 (sensor: $150, wiring repair: $100)
Result: Steering responsiveness returned to normal, and the check engine light remained off after a road test.
Case Study 2: Wiring Repair on 2017 Chevrolet Malibu
Vehicle: 2017 Chevrolet Malibu, 40,000 miles
Problem: Customer noticed intermittent steering issues and the stability control warning light.
Diagnosis: OBD scan revealed C0801. Inspection uncovered corroded connectors at the steering angle sensor.
Solution: Cleaned the connectors and replaced corroded wiring. Cleared the DTCs and performed a function test.
Cost: $120 (wiring repair: $120)
Result: The vehicle passed the function test, and the customer reported improved steering performance.