Quick Answer
C0339 means: C0339 indicates a problem with the steering wheel position sensor circuit.
Can I drive with C0339? Immediate attention is recommended to ensure safe vehicle operation.
Common Questions
What does C0339 mean and how does it affect my car?
C0339 indicates a problem with the steering wheel position sensor circuit, which can lead to issues with vehicle handling. This could affect stability and traction controls, making driving less safe.
What are the most common causes of C0339 and how much does it cost to fix?
The most common cause of C0339 is a faulty sensor, which can cost between $200 to $500 to replace. Other causes include damaged wiring or software issues, which may have varying repair costs.
Can I drive my car with C0339 or should I stop immediately?
While it may be possible to drive with C0339, it is not advisable due to potential safety risks. Immediate attention is recommended to prevent accidents.
How can I diagnose C0339 myself using GeekOBD APP?
Using the GeekOBD APP, connect to your vehicle's OBD2 port, scan for codes, and review freeze frame data for context. Look for any other related codes that might provide additional insight.
What vehicles are most commonly affected by C0339?
C0339 is frequently seen in vehicles like the 2012-2018 Ford Focus, Chevrolet Malibu, and Honda Accord models, particularly those equipped with advanced steering systems.
How can I prevent C0339 from happening again?
Regular maintenance, including checks on electrical connections and updating ECU software, can help prevent C0339 from recurring. Also, avoid harsh driving conditions that could damage the sensor.
What is C0339?
The Diagnostic Trouble Code (DTC) C0339 refers to a specific issue within the steering wheel position sensor circuit. This sensor is crucial for various vehicle functions, particularly in modern vehicles equipped with advanced driver-assistance systems (ADAS). When the steering wheel position sensor detects a value outside of its expected range, it triggers the C0339 code. This can lead to several performance issues, affecting the vehicle's stability control systems, traction control, and even the effectiveness of the vehicle's electronic stability program (ESP). If left unaddressed, problems related to the steering wheel position sensor can compromise your safety on the road, as it may result in unexpected steering behavior, reduced responsiveness, and other handling issues. Common symptoms include a persistent check engine light, erratic steering response, and sometimes even a noticeable decrease in fuel efficiency due to the vehicle's systems working harder to compensate for the sensor's malfunction. This code can often be found in various makes and models, but is especially prevalent in vehicles manufactured by Ford, Chevrolet, and Honda from the years 2012 to 2018. Understanding the implications of DTC C0339 is essential for maintaining the performance and safety of your vehicle.
System: C - Chassis (ABS, Steering, Suspension)
Symptoms
Common symptoms when C0339 is present:
- The check engine light stays on constantly, indicating a fault in the steering system.
- Steering feels loose or unresponsive, leading to a lack of control while driving.
- Fuel economy decreases significantly, sometimes by up to 15%, due to the vehicle's systems compensating for the sensor issue.
- Unusual noises when turning the steering wheel, often described as grinding or clunking sounds.
- Erratic behavior of traction control or stability control systems, which may activate unexpectedly.
Possible Causes
Most common causes of C0339 (ordered by frequency):
- The most common cause of C0339 is a faulty steering wheel position sensor itself, with a likelihood of around 70%. This could be due to wear and tear or manufacturing defects.
- Another potential cause is damaged wiring or poor connections in the sensor circuit, which can occur in older vehicles or those exposed to harsh conditions.
- A third cause could be software issues within the vehicle’s electronic control unit (ECU). Regular updates and checks can help prevent this.
- Less commonly, physical damage to the steering column or steering rack can lead to this code, often as a result of accidents or improper repairs.
- Rarely, environmental factors like moisture or corrosion can affect the sensor's performance, leading to intermittent faults.
C0339 Repair Costs
Cost Breakdown by Repair Type
Steering Wheel Position Sensor Replacement
Replacing the faulty steering wheel position sensor with a new OEM part.
- Total: $200 - $500
- Success rate: 90%
Wiring Repair
Repairing damaged wiring or connectors related to the sensor circuit.
- Total: $100 - $300
- Success rate: 85%
Money-Saving Tips for C0339
- 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 C0339 Diagnosis Process
Follow these systematic steps to accurately diagnose C0339. 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 (5-10 minutes)
Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes).
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes)
Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes).
Step 3: Step 3: Component testing - Use multimeter or specific diagnostic tools to test suspected components, focusing on the steering wheel position sensor (20-30 minutes)
Step 3: Component testing - Use multimeter or specific diagnostic tools to test suspected components, focusing on the steering wheel position sensor (20-30 minutes).
Step 4: Step 4: System function test - Verify proper operation after repairs and clear codes, ensuring no new codes appear (10-15 minutes)
Step 4: System function test - Verify proper operation after repairs and clear codes, ensuring no new codes appear (10-15 minutes).
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and monitor for any reoccurring faults (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and monitor for any reoccurring faults (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: Ford Focus Steering Sensor Replacement
Vehicle: 2015 Ford Focus, 75,000 miles
Problem: Customer reported a constant check engine light and loose steering.
Diagnosis: Using the GeekOBD APP, we confirmed C0339 and inspected the steering position sensor.
Solution: Replaced the faulty steering wheel position sensor and repaired damaged wiring.
Cost: $450 (parts: $300, labor: $150)
Result: The steering response improved significantly, and the check engine light was cleared successfully.
Case Study 2: Honda Accord Wiring Repair
Vehicle: 2014 Honda Accord, 60,000 miles
Problem: Customer noticed intermittent traction control issues and check engine light.
Diagnosis: DTC C0339 was retrieved, and thorough inspections revealed corroded wiring.
Solution: Repaired the corroded wiring and cleared the codes.
Cost: $200 (including parts and labor)
Result: The traction control system returned to normal operation, and the customer was pleased with the outcome.